ALTERRA HEALTHCARE CORP
8-K, 2000-05-05
SOCIAL SERVICES
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================================================================================


                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   ----------

                                    FORM 8-K


                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934


        Date of Report (date of earliest event reported): April 26, 2000


                                   ----------


                         ALTERRA HEALTHCARE CORPORATION
             (Exact name of registrant as specified in its charter)



           DELAWARE                       1-11999               39-1771281
(State or other jurisdiction of   (Commission file number)   (I.R.S. Employer
 incorporation or organization)                             Identification No.)


                                   ----------


                             10000 INNOVATION DRIVE
                           MILWAUKEE, WISCONSIN 53226
                    (Address of principal executive offices)

                                 (414) 918-5000
              (Registrant's telephone number, including area code)


================================================================================


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ITEM 5.  OTHER EVENTS

         On April 26, 2000, the Registrant issued a press release announcing
that it has entered into a Purchase Agreement pursuant to which it has agreed to
issue, under certain terms and conditions, between $138.0 million and $203
million of convertible senior debentures and convertible preferred shares to
certain investors (the "Press Release"), a copy of which Purchase Agreement and
Press Release are filed as exhibits hereto. The text of the Press Release is
incorporated herein by this reference.


ITEM 7.  EXHIBITS

         99.1     Press release dated April 26, 2000

         99.2     Purchase Agreement dated as of April 26, 2000 between the
                  Registrant and RDVEPCO, L.L.C., a Michigan limited liability
                  company, Group One Investors, L.L.C., a Michigan limited
                  liability company, and Holiday Retirement 2000, LLC, a
                  Washington limited liability company (schedules to this
                  agreement have been omitted pursuant to Item 601(b)(2) of the
                  Regulation S-K; the Registrant agrees to furnish
                  supplementally to the Commission, upon request, a copy of
                  these schedules)


<PAGE>   3

                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


Dated:  May 5, 2000


                                        ALTERRA HEALTHCARE CORPORATION
                                 --------------------------------------------
                                                 (Registrant)


                                 By: /s/ Mark W. Ohlendorf
                                    -----------------------------------------
                                    Mark W. Ohlendorf, Senior Vice President,
                                    Chief Financial Officer and Treasurer


<PAGE>   4

                                  EXHIBIT INDEX


99.1     Press Release dated April 26, 2000.

99.2     Purchase Agreement dated as of April 26, 2000 between the Registrant
         and RDVEPCO, L.L.C., a Michigan limited liability company, Group One
         Investors, L.L.C., a Michigan limited liability company, and Holiday
         Retirement 2000, LLC, a Washington limited liability company (schedules
         to this agreement have been omitted pursuant to Item 601(b)(2) of the
         Regulation S-K; the Registrant agrees to furnish supplementally to the
         Commission, upon request, a copy of these schedules)



<PAGE>   1

                                                                    EXHIBIT 99.1


ALTERRA HEALTHCARE CORPORATION ANNOUNCES DEFINITIVE AGREEMENT FOR $138.0
MILLION EQUITY-LINKED FINANCING


         MILWAUKEE, Wisconsin, April 26, 2000, Alterra Healthcare Corporation
(AMEX: ALI) ("Alterra" or the "Company"), the nation's largest operator of
assisted living residences, today announced that it entered into a definitive
agreement pursuant to which it will issue $138.0 million of convertible senior
debentures and convertible preferred shares to certain investors including
significant existing shareholders of the Company as well as an investment
vehicle of Messrs. Daniel Baty and William Colson, senior executives and
directors of Holiday Retirement Corporation and Emeritus Corporation (AMEX: ESC)
(together the "Investors").


         Mr. Bill Lasky, President and Chief Executive Officer of the Company
said, "We are pleased to announce this transaction which will provide us with a
significant capital infusion at this critical juncture in our Company's history.
We are grateful for the continuing support of these major shareholders. In
addition, we are delighted to forge a new relationship with Mr. Baty and Mr.
Colson, senior executives and directors of the world's largest senior housing
company and one of the largest US assisted living companies. We are looking
forward to taking advantage of the reach of our collective organizations that we
believe will emerge as a result of this new partnership." Mr. Baty added, "we
are excited to participate in this attractive investment in Alterra and will
seek to realize benefits for each of our respective constituencies in the
future."


         The transaction consists of (i) $133.0 million of Series A and Series B
convertible senior debentures with a conversion price of $4.00 per share, a
9.75% semi-annual payment-in-kind ("PIK") coupon and a seven year maturity, and
(ii) $5.0 million of Series A convertible preferred shares with a conversion
price of $4.00 per share and a 9.75% semi-annual PIK dividend and a mandatory
redemption in seven years. The Series A debentures and Series A preferred shares
will be convertible at any time at the investor's option into shares of common
stock of the Company. The Series B debentures will be convertible at any time at
the investor's option into non-voting Series B preferred shares having rights
(other than voting rights) substantially similar to the Company's common stock.
The Company may call the debentures and the Series A preferred shares at any
time after three years under certain circumstances relating to the price of its
common stock. As part of the transaction, the Investors will have the option to
purchase up to an additional $65.0 million of Series B debentures, for an
aggregate transaction amount of approximately $200.0 million.


         The definitive agreement is subject to certain closing conditions
including (i) receipt of certain covenant modifications from the Company's
lenders and lessors, (ii) Hart-Scott-Rodino compliance, (iii) receipt of all
appropriate regulatory and other necessary approvals, (iv) other customary
closing conditions and (v) a closing by no later than May 31, 2000. The
definitive agreement provides for a termination fee of $5.0 million and certain
other obligations payable in the event the Company's directors, in discharging
their fiduciary duties, elect to consummate an alternative equity or
equity-linked transaction. As part of the transaction, the Company will increase
its board of directors to a total of nine members, with four of the nine
directors to be elected by the holders of the Series A preferred shares. The
Investors intend to elect Messrs. Robert Haveman and Jerry Tubergen, both of
whom are existing directors of the Company, as preferred directors. In addition,
the Investors intend to elect Mr. William Colson as a preferred director to the
Board. Prior to joining the Board, Mr. Colson is also expected to resign his
directorship of Emeritus Corporation. No assurances can be made that the
transaction will be consummated on a timely basis and on terms acceptable to the
Company.

         The Company will use the proceeds from this transaction to (i) finance
the completion of residences currently under construction, (ii) repay certain
interim bridge indebtedness provided by one of the Investors, (iii) acquire a
recently built portfolio of 14 Company managed assisted living residences from
certain Investors and affiliates, (iv) selectively acquire third-party equity
interests in certain of its


<PAGE>   2

joint-venture arrangements, including joint-venture interests held by certain
Investors and (v) for working capital and other general corporate purposes.

         Alterra Healthcare Corporation offers supportive and healthcare
services to our nation's frail elderly and is the nation's largest operator of
assisted living residences. The Company currently operates 450 assisted living
residences representing a capacity for approximately 21,000 elderly senior
residents in 27 states. The Company's common stock is traded on the American
Stock Exchange under the symbol "ALI."

         Holiday Retirement Corp. is the largest operator of independent living
retirement facilities in North America. Holiday currently manages over 75,000
units in the United States, Canada, and Europe. Emeritus Assisted Living is one
of the largest developers and operators of freestanding assisted living
communities throughout the United States and has commenced development and
operations of assisted living facilities in Japan. Emeritus currently holds
interests in 134 communities representing capacity for approximately 13,700
residents in 29 states and Japan.

         The statements in this release relating to matters that are not
historical facts are forward-looking statements based on management's belief and
assumptions using currently available information. Although the Company believes
that the expectations reflected in such forward-looking statements are
reasonable, it cannot give any assurances that these expectations will prove to
be correct. Such statements involve a number of risks and uncertainties,
including, but not limited to, substantial debt and operating lease payment
obligations, operating losses associated with new residences, the Company's
ability to implement its new strategic initiatives and improve cash flow, the
need for additional financing and liquidity, development and construction risks,
risks associated with acquisitions, competition, governmental regulation and
other risks and uncertainties detailed in the reports filed by the Company with
the Securities and Exchange Commission. Should one or more of these risks
materialize (or the consequences of such a development worsen), or should the
underlying assumptions prove incorrect, actual results could differ materially
from those forecasted or expected. The Company assumes no duty to publicly
update such statements.







CONTACT:          Alterra Healthcare Corporation
                  Mark Ohlendorf
                  Chief Financial Officer
                  800-236-3454 or 414-918-5401




<PAGE>   1

                                                                    EXHIBIT 99.2
                               PURCHASE AGREEMENT

         THIS PURCHASE AGREEMENT, made and entered into as of April 26, 2000, by
and among ALTERRA HEALTHCARE CORPORATION, a Delaware corporation (the
"Company"), as seller, and RDVEPCO, L.L.C., a Michigan limited liability
company, GROUP ONE INVESTORS, L.L.C., a Michigan limited liability company, and
HOLIDAY RETIREMENT 2000, LLC, a Washington limited liability company, each
individually a "Purchaser" and, collectively, the "Purchasers"), as purchasers.

                                    RECITALS:

         Subject to the terms and conditions of this Agreement, the Company
proposes to issue and sell to the Purchasers, and the Purchasers propose to
purchase from the Company, 1,250,000 shares of the Company's Series A 9.75%
Convertible Pay-In-Kind Preferred Stock, stated value $4.00 per share (the
"Series A Stock"), and $42,500,000 face amount of the Company's Series A 9.75%
Convertible Pay-In-Kind Debentures (the "Series A Debentures") and a minimum of
$90,426,000 face amount of the Company's Series B 9.75% Convertible Pay-in-Kind
Debentures (the "Series B Debentures," together with the Series A Debentures,
collectively the "Debentures").

         The Debentures and the Series A Stock to be purchased hereunder by the
Purchasers are sometimes collectively referred to as the "Securities".

         NOW, THEREFORE, the parties hereto promise and agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

         In addition to terms defined elsewhere in this Agreement, as used in
this Agreement, unless the context requires a different meaning, the following
terms have the meanings indicated:

         "Acting Purchasers" is defined in Section 12.1(a) of this Agreement.

         "Additional Debentures" is defined in Section 2.2 of this Agreement.

         "Affiliate" means, with respect to any Person, either (i) any
Subsidiary of such Person, or (ii) any other Person that, directly or
indirectly, controls, is controlled by or is under common control with such
Person. For the purposes of this definition, "control" (including, with
correlative meanings, the terms "controlled by" and "under common control with")
shall mean the possession, directly or indirectly, of the power to direct or
cause the direction of the management and policies of such Person, whether
through the ownership of voting securities or by contract or otherwise.

         "Agreement" means this agreement and all of the exhibits and schedules
hereto.

         "AMEX" is defined in Section 3.1(g) of this Agreement.


<PAGE>   2

         "Business Day" means any day except Saturday, Sunday and any day that
is a legal holiday or on which banking institutions in the State of New York are
authorized or required by law or other government action to close.

         "Closing Dates" shall mean each of the Initial Closing Date and each
Subsequent Closing Date.

         "Common Stock" means the $.01 par value common stock of the Company.

         "Company" has the meaning set forth in the first paragraph of this
Agreement.

         "Conversion Securities" means the Common Stock or Series B Stock of the
Company into which the Securities are convertible in accordance with their
respective terms.

         "Current SEC Documents" is defined in Section 3.1(l)(i) of this
Agreement.

         "Debentures" has the meaning set forth in the Recitals to this
Agreement.

         "Designation" means collectively those certain certificates of
designation of rights and preferences and other characteristics of the Series A
Stock and the Series B Stock in substantially the form of Exhibits A-1 and A-2,
respectively, hereto pursuant to which the Preferred Stock shall be authorized
by the Company.

         "Equity Holder" means each Purchaser and any other Person that owns any
equity securities of the Company, any options, rights or warrants to acquire any
equity securities of the Company or any debt securities, or the right to acquire
any debt securities, of the Company which are convertible into or exchangeable
for any equity securities of the Company.

         "Exchange Act" means the Securities Exchange Act of 1934, as amended,
and the rules and regulations promulgated thereunder.

         "Financial Model" is defined in Section 4.12 of this Agreement.

         "Financing Proposal" is defined in Section 10.1 of this Agreement.

         "Indenture" means that certain Indenture in substantially the form of
Exhibit B hereto to be dated as of the Initial Closing Date between the Company
and a trustee reasonably acceptable to the Company and the Acting Purchasers,
setting forth the rights and privileges of the Debentures and pursuant to which
the Debentures will be issued and authenticated.

         "Initial Closing" is defined in Section 2.1(b) of this Agreement.

         "Initial Closing Date" is defined in Section 2.1(b) of this Agreement.

         "Initial Securities" is defined in Section 2.1(a) of this Agreement.


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<PAGE>   3

         "Lien" means, with respect to any asset, any mortgage, lien, pledge,
encumbrance, charge or security interest of any kind in or on such asset or the
revenues or income thereon or therefrom.

         "Losses" with respect to any Person means all claims, actions,
liabilities, obligations, losses, damages, penalties, judgments, suits, costs,
reasonable expenses or disbursements of any kind whatsoever (including, without
limitation, reasonable attorney's fees) actually suffered or incurred by such
Person.

         "Material Adverse Effect" means any change or effect that, individually
or when taken together with all other such other changes or effects, is or would
reasonably be expected to be materially adverse to the business, operations,
prospects, properties or condition (financial or otherwise) of the Company and
its Subsidiaries, taken as a whole, or the Company's ability to perform its
obligations hereunder.

         "Permitted Purchaser Assignee" is defined in Section 14.4 of this
Agreement.

         "Person" means an individual or a corporation, partnership, trust,
incorporated or unincorporated association, joint venture, limited liability
company, joint stock company, government (or an agency or political subdivision
thereof) or other entity of any kind.

         "Preferred Stock" means the Series A Stock and the Series B Stock.

         "Purchaser" has the meaning set forth in the first paragraph of this
Agreement.

         "Registration Rights Agreement" means a registration rights agreement
providing customary demand and piggyback registration rights to the Purchasers
with respect to the Securities, in form and substance reasonably acceptable to
the parties hereto.

         "Restated Bylaws" are defined in Section 3.1(a) of this Agreement.

         "SEC" means the Securities and Exchange Commission.

         "SEC Documents" is defined in Section 3.1(l)(i) of this Agreement.

         "Securities" has the meaning set forth in the Recitals to this
Agreement.

         "Securities Act" means the Securities Act of 1933, as amended, and the
rules and regulations promulgated thereunder.

         "Series B Stock" means the Company's Series B Participating Preferred
Stock having the terms set forth in the Designation to be filed pursuant to
Section 3.1(a) hereof.

         "Special Committee" means the Equity Investment Committee of the Board
of Directors of the Company established by the Board of Directors of the Company
on March 20, 2000.

         "Subsequent Closing" has the meaning set forth in Section 2.2(b) of
this Agreement.


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<PAGE>   4

         "Subsequent Closing Date" has the meaning set forth in Section 2.2(b)
of this Agreement.

         "Subsidiary" means, as to any Person, any corporation, limited
partnership, limited liability company or other business entity in which such
Person or one or more of its Subsidiaries or such Person and one or more of its
Subsidiaries owns sufficient equity or voting interests to enable it or them (as
a group) ordinarily, in the absence of contingencies, to elect a majority of the
directors (or Persons performing similar functions) of such entity, and any
partnership or joint venture if more than a 50% interest in the profits or
capital thereof is owned by such Person or one or more of its Subsidiaries or
such Person and one or more of its Subsidiaries. Unless the context otherwise
clearly requires, any reference to a "Subsidiary" is a reference to a Subsidiary
of the Company.

         "Superior Proposal" is defined in Section 10.1 of this Agreement.

         "TPI" means Third Party Investors I, LLC, a Delaware limited liability
company.

         "TPI Member" is defined in Section 9.1 of this Agreement.

         "TPI Membership Interest" is defined in Section 9.1 of this Agreement.

         "TPI Membership Interest Value" is defined in Section 9.1 of this
Agreement.

         "TPI-HCR" means TPI-HCR, LLC, a Delaware limited liability company.

         "TPI-HCR Assignee" is defined in Section 8.1 of this Agreement.

         "TPI-HCR Membership Interest" is defined in Section 8.1 of this
Agreement.

         "TPI-HCR Membership Interest Value" is defined in Section 8.1 of this
Agreement.

         "Transaction Documents" is defined in Section 3.1(d) of this Agreement.

                                   ARTICLE II
                             PURCHASE OF SECURITIES

         Section 2.1. Purchase of Securities; the Initial Closing.

         (a) On the terms and subject to the conditions herein set forth, the
Company agrees to sell to the Purchasers and the Purchasers agree to purchase
from the Company on the Initial Closing Date an aggregate of (i) 1,250,000
shares of the Series A Stock for the purchase price of $4.00 per share, or an
aggregate of $5,000,000, (ii) an aggregate of $42,500,000 in face amount of the
Series A Debentures for a purchase price equal to the face amount thereof, and
(iii) an aggregate of $90,426,000 in face amount of the Series B Debentures for
a purchase price equal to the face amount thereof. The shares of Series A Stock
and face amount of Debentures to be purchased on the Initial Closing Date are
hereinafter referred to collectively as the "Initial Securities." The amount of
the Initial Securities to be purchased by and sold to each of the Purchasers is
set forth opposite the name of each of the Purchasers on Schedule 2.1(a).


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<PAGE>   5

         (b) The purchase and sale of the Initial Securities shall take place at
a closing (the "Initial Closing") to be held at the offices of the Company,
10000 Innovation Drive, Milwaukee, Wisconsin 53226, at 10:00 a.m. local time, on
or before May 31, 2000, provided that all conditions set forth in Article IV,
Article V and Article VI have been satisfied or waived, or at such other time or
place as the Company and the Purchasers mutually agree (such date, the "Initial
Closing Date").

         (c) Delivery of the Initial Securities shall be made at the Initial
Closing by delivery to the respective Purchasers, against payment of the
purchase price therefor provided in this Section 2.1 of stock certificate(s) and
Debentures representing the Initial Securities duly registered in the name of
the respective Purchasers.

         (d) Except as provided in Section 8.1 or Section 9.1, payment of the
purchase price to the Company for the Initial Securities purchased by each of
the Purchasers shall be made by each of them by wire transfer of same day funds
to an account designated by the Company therefor and in the manner as set forth
in a closing statement in form and substance reasonably satisfactory to the
parties hereto.

         (e) The obligation of the Purchasers is several and not joint and no
Purchaser shall be liable for the failure of any other Purchaser to fulfill its
obligations under this Agreement.

         Section 2.2.      Purchase of Additional Debentures.

         (a) On the terms and subject to the conditions herein set forth, at any
time after the Initial Closing Date and not later than ninety (90) days after
the Initial Closing Date, each Purchaser shall have the right from time to time
to purchase at the face amount thereof from the Company a pro rata portion of
Series B Debentures having an aggregate face amount of $65,000,000 (the
"Additional Debentures") as set forth opposite the name of each Purchaser on
Schedule 2.1(a) by tendering payment therefor to the Company; provided, however,
that no Purchaser may exercise its right to purchase Additional Debentures more
than twice without the prior consent of the Company.

         (b) The purchases and sales of the Securities under Section 2.2(a)
("Subsequent Closings") shall be held at the offices of the Company, 10000
Innovation Drive, Milwaukee, Wisconsin 53226 at 10:00 a.m. local time on the
date one (1) business day after the receipt by the Company of the tender of
payment by a Purchaser pursuant to Section 2.2(a) ("Subsequent Closing Dates")
by wire transfer of same day funds to the account designated by the Company
therefor.

         Section 2.3. Commitment Fee. Upon the Initial Closing, the Company
shall pay to certain of the Purchasers the sum of $3,000,000.00 as a commitment
fee for the purchase of the Securities as set forth on Schedule 2.1(a).

                                   ARTICLE III
                         REPRESENTATIONS AND WARRANTIES

         Section 3.1. Representations and Warranties of the Company. In order to
induce Purchasers to enter into this Agreement and to purchase the Securities,
the Company hereby


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<PAGE>   6

represents and warrants to, and agrees with, Purchasers and their successors,
endorsees and assigns that, notwithstanding any independent investigation made
or not made, inquiry or knowledge of the Purchasers:

         (a) Statement of Designation; Adoption of Amended and Restated Bylaws.
Before the Initial Closing, the Company will file the Designation with the
Secretary of State of the State of Delaware. Upon such filing, the Designation
and the resolutions of the Company's Board of Directors contained therein will
be in full force and effect. On or before the Initial Closing, the Board of
Directors shall adopt the Amended and Restated Bylaws in the form of Exhibit C
hereto ("Restated Bylaws") and the same shall be in full force and effect at the
time of the Initial Closing.

         (b) Organizational Documents. The Company has delivered to Purchaser an
accurate and complete copy of (a) its Restated Certificate of Incorporation and
all amendments thereto, certified by the Secretary of State of the State of
Delaware ("Restated Certificate"), and (b) its Amended and Restated Bylaws as
presently in effect (the "Current Bylaws"), certified by its Secretary or
Assistant Secretary.

         (c) Existence and Qualification. The Company and each Subsidiary is a
corporation, general partnership, limited partnership or limited liability
company duly organized, validly existing and in good standing under the laws of
the state of its organization and is duly qualified to do business and in good
standing in each other jurisdiction in which its ownership of property or
conduct of business requires it to qualify or, if not so qualified, is not
subject to material liability by reason of its failure to be so qualified.
Schedule 3.1(c) hereto lists all of the Subsidiaries.

         (d) Power and Authority. The Company and each Subsidiary have all
applicable statutory power and authority necessary to own, operate or lease
their respective properties and assets and to conduct their respective
businesses as now conducted by them. The Company has all corporate power and
authority necessary to issue the Securities pursuant to the Designation and the
Indenture, and to execute, deliver, and perform its obligations under this
Agreement, and the Registration Rights Agreement (collectively, the "Transaction
Documents").

         (e) Corporate Action. The Company has taken all corporate action
required to authorize the issuance, in accordance with the terms and conditions
hereof, of the Securities pursuant to the Designation and the Indenture and the
execution, delivery and performance of the Transaction Documents.

         (f) Execution and Delivery. The Company has duly executed and
delivered, or, as applicable, at the Initial Closing will execute and deliver,
each of the Transaction Documents. The stock certificates and Debentures
representing the Securities, when delivered, will have been duly and properly
authorized, executed and delivered pursuant to the Designation and the
Indenture.

         (g) Consents; Governmental Approvals. Except as set forth in Schedule
3.1(g), no consent or approval of any Person, firm or corporation, and no
consent, license, approval or authorization of, or registration, filing or
declaration with, any governmental authority is required to be obtained or made
by or on behalf of the Company in connection with the offer,


                                       6
<PAGE>   7

issuance and sale of the Securities, the issuance of the Conversion Securities
upon conversion of the Securities, the execution, delivery or performance of any
of the Transaction Documents or the completion of the transactions contemplated
thereby, except for (i) the filing of the Designation with the Secretary of
State of the State of Delaware, and (ii) filings with the SEC, the American
Stock Exchange ("AMEX") and applicable authorities pursuant to applicable state
securities laws that may be required; each of which shall have been obtained
(subject to notice of issuance in the case of clause (ii) above) or made prior
to or simultaneously with the closing of the sale of (A) Initial Securities on
the Initial Closing Date or (B) any Additional Debentures on any applicable
Subsequent Closing Date.

         (h) Binding Effect. Each of the Transaction Documents is a legal, valid
and binding obligation of the Company enforceable against the Company in
accordance with its terms, except as enforceability may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the
enforcement of creditors' rights generally or limitations on the availability of
equitable remedies.

         (i) Absence of Conflicts. Except as set forth in Schedule 3.1(g), the
issuance of the Securities and the execution, delivery and performance of the
Transaction Documents by the Company do not and will not (i) conflict with or
violate any provision of the Restated Certificate or the Restated Bylaws, or
(ii) conflict with or result in a violation, breach or default by the Company or
any of the Subsidiaries under any provision of any existing statute, law, rule
or regulation binding on it or any order, judgment, award, decree, license or
authorization of any court or governmental instrumentality, authority, bureau or
agency binding on it or any of the Subsidiaries, or (iii) result in the creation
or imposition of any lien, encumbrance or other charge on any of its or any of
the Subsidiaries' properties or assets. Except as set forth in Schedule 3.1(g),
the issuance of the Securities and the execution, delivery and performance of
the Transaction Documents by the Company do not and will not conflict with or
result in a violation, breach or default by the Company or any of the
Subsidiaries under any provision of any mortgage, indenture, lease or other
contract, agreement, instrument or undertaking to which it or any of the
Subsidiaries is a party or will be a party immediately after the Initial
Closing, or by which or to which it or any of the Subsidiaries or any of its or
any of the Subsidiaries' property or assets is now or immediately after the
Initial Closing will be bound or subject, except for such conflicts, violations,
breaches or defaults which would not have, or reasonably be expected to have, a
Material Adverse Effect.

         (j) No Defaults. Except as set forth in Schedule 3.1(j), none of the
Company or the Subsidiaries is, or immediately after each of the Initial Closing
and each Subsequent Closing will be, in default under or in violation of its
certificate of incorporation or bylaws or comparable organizational documents.
Except as set forth in Schedule 3.1(j) and except for such defaults or
violations which would not have, or reasonably be expected to have, a Material
Adverse Effect, none of the Company or the Subsidiaries is, or immediately after
each of the Initial Closing and each Subsequent Closing will be, in default
under or in violation of (i) any agreement or instrument to which it is a party
relating to its indebtedness for borrowed money, (ii) any other agreement or
instrument to which it is a party, or (iii) any certification or approval
requirement of any customer, supplier, or other Person (excepting governmental
authorities).

         (k) Capitalization and Stockholders. Except as set forth in Schedule
3.1(k), the entire authorized, issued and outstanding capital stock of the
Company is as set forth in the Current


                                       7
<PAGE>   8

SEC Documents. Immediately after each of the Initial Closing and each Subsequent
Closing, all outstanding shares of capital stock of the Company will be duly and
validly issued. Except as set forth in Schedule 3.1(k) and except for the
Securities, after each of the Initial Closing and each Subsequent Closing, there
will be no options, warrants or other rights outstanding or proposed involving
the issuance of any additional shares of capital stock of the Company or any
securities outstanding or proposed which are or will be convertible into or
exchangeable for shares of capital stock of the Company.

         (l)  SEC Documents.

                  (i) The Common Stock of the Company is registered pursuant to
         Section 12(b) of the Exchange Act and the Company has filed all
         reports, schedules, forms, statements and other documents required to
         be filed by it with the SEC pursuant to the reporting requirements of
         the Exchange Act, including material filed pursuant to Section 13(a) or
         15(d) thereof, in addition to one or more registration statements and
         amendments thereto heretofore filed by the Company with the SEC. The
         Company has delivered or made available to the Purchasers true and
         complete copies of (i) its annual reports on Form 10-K and quarterly
         reports on Form 10-Q for its 1998 and 1999 fiscal years, (ii) proxy
         statements, information and solicitation materials filed by the Company
         with the SEC since January 1, 1998, and (iii) each other report,
         registration statement, proxy statement and other document filed with
         the SEC since the filing of its most recent Form 10-K (all of the
         foregoing, collectively, the "SEC Documents"; the most recent Form 10-K
         and the items referred to in clause (iii) above, collectively, the
         "Current SEC Documents"). The Company has not provided to the
         Purchasers any information which, according to applicable law, rule or
         regulation, should have been disclosed publicly by the Company but
         which has not been so disclosed, other than with respect to the
         transactions contemplated by this Agreement.

                  (ii) As of their respective dates, the SEC Documents complied
         in all material respects with the requirements of the Exchange Act and
         other federal, state and local laws, rules and regulations applicable
         to such SEC Documents, and none of the SEC Documents contained any
         untrue statement of a material fact or omitted to state a material fact
         required to be stated therein or necessary in order to make the
         statements therein, in light of the circumstances under which they were
         made, not misleading.

         (m) Financial Statements. The financial statements of the Company
included in the Current SEC Documents comply as to form in all material respects
with applicable accounting requirements and the published rules and regulations
of the SEC or other applicable rules and regulations with respect thereto. Such
financial statements have been prepared in accordance with generally accepted
accounting principles applied on a consistent basis during the periods involved
(except (i) as may be otherwise indicated in such financial statements or the
notes thereto or (ii) in the case of unaudited interim statements, to the extent
they may not include footnotes or may be condensed or summary statements) and
fairly present in all material respects the financial position of the Company as
of the dates thereof and the results of operations and cash flows for the
periods then ended (subject, in the case of unaudited statements, to normal
year-end audit adjustments).


                                       8
<PAGE>   9

         (n) No Material Adverse Effect. Since December 31, 1999, the date
through which the most recent annual report of the Company has been prepared and
filed with the SEC, a copy of which is included in the Current SEC Documents,
there has been no Material Adverse Effect, except as otherwise disclosed or
reflected in Current SEC Documents or other public announcements of the Company,
or otherwise disclosed in writing to the Purchasers on or before the date of
this Agreement.

         (o) No Undisclosed Events or Circumstances. No event or circumstance
has occurred or exists with respect to the Company or any of the Subsidiaries,
or their respective businesses, properties, operations or financial condition,
which, under applicable law, rule or regulation, requires public disclosure or
announcement by the Company and which has not been so publicly disclosed or
announced, or otherwise disclosed in writing to the Purchasers on or before the
date of this Agreement.

         (p) No General Solicitation. Neither the Company, nor any of its
Affiliates, or, to its knowledge, any Person acting on its or their behalf has
engaged in any form of general solicitation or general advertising (within the
meaning of Regulation D under the Securities Act) in connection with the offer
or sale of the Securities.

         (q) No Integrated Offering. Neither the Company, nor any of its
Affiliates, nor any Person acting on its or their behalf has, directly or
indirectly, made any offers or sales of any security or solicited any offers to
buy any security, under circumstances that would require registration of the
Securities under the Securities Act.

         (r) Brokers. The Company represents and warrants that it has employed
no brokers, agents or finders in carrying on the negotiations relating to this
Agreement or to the transactions herein contemplated, except as the Company has
previously disclosed in writing to the Purchasers.

         (s) Untrue or Misleading Statements. Neither this Agreement nor any
other Transaction Document or other agreement, certificate, instrument or
written statement furnished by or on behalf of the Company to the Purchasers in
connection with the transactions contemplated by this Agreement, (including the
Current SEC Documents but excluding any financial forecasts or projections
furnished to or reviewed by the Purchaser), when taken together, contains any
untrue statement of a material fact or omits a material fact necessary to make
the statements contained therein not misleading in light of the circumstances in
which such statement were made. With respect to financial forecasts, estimates,
budgets and projections the Company has furnished to the Purchasers, such
materials have been reasonably prepared on a basis reflecting reasonable
estimates and judgments of the management of the Company as to the future
performance of the Company and the Subsidiaries.

         (t) Reservation of Common Stock and Series B Stock. As of the Initial
Closing and each Subsequent Closing, the Company shall have reserved for
issuance, and will at all times keep available, a sufficient number of shares of
Common Stock and Series B Stock to permit the conversion of all Securities into
Common Stock or Series B Stock, respectively. Such Common Stock and Series B
Stock when issued upon such conversion will be duly authorized, fully paid and
nonassessable.


                                       9
<PAGE>   10

         (u) Status of Securities. The Securities, upon issuance by the Company
following receipt of the consideration provided for herein and satisfaction of
the other conditions set forth herein, will be duly authorized, fully paid and
nonassessable.

         (v) Government Regulations. The Company is not (i) an "investment
company" as defined in or subject to regulation under the Investment Company Act
of 1940, as amended, or controlled by an "investment company", or (ii) subject
to regulation under the Public Utility Holding Company Act of 1935.

         (w) Year 2000 Compliance. All computer applications (including to the
knowledge of the Company after due inquiry, those of its suppliers and vendors)
that are material to the conduct of the business of the Company and any of the
Subsidiaries are able to perform properly date sensitive functions for all dates
before and after January 1, 2000 (i.e., "Year 2000 Compliant"), except as
described in the Current SEC Documents.

         (x) Environmental Laws. Each of the Company and the Subsidiaries is in
compliance, in all material respects, with and not subject to any material
liability under applicable Environmental Laws (as defined below). Each of the
Company and the Subsidiaries has made all filings and provided all notices
required under any applicable Environmental Laws, and has, and is in compliance,
in all material respects, with, all Permits required under any applicable
Environmental Laws and each of them is in full force and effect. There is no
civil, criminal or administrative action, suit, demand, claim, hearing, notice
of violation, investigation, proceeding, notice or demand letter or request for
information pending or, to the knowledge of the Company or the Subsidiaries,
threatened against the Company or any of the Subsidiaries under any
Environmental Law. No lien, charge, encumbrance or restriction has been recorded
under any Environmental Law with respect to any assets, facility or property
owned, operated, leased or controlled by the Company or the Subsidiaries. None
of the Company or the Subsidiaries has received notice that it has been
identified as a potentially responsible party under the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, as amended
("CERLA"), or any comparable state law. No property or facility of the Company
or any of the Subsidiaries is listed or proposed for listing on the National
Priorities List under CERCLA, or is listed in the Comprehensive Environmental
Response, Compensation, Liability Information System List promulgated pursuant
to CERCLA, or on any comparable list maintained by any state or local
governmental authority.

         For purposes of this Agreement, "Environmental Laws" means the (a)
Toxic Substances Control Act, 15 USC 2601 et seq.; (b) National Historic
Preservation Act, 16 USC 470 et seq.; (c) Coastal Zone Management Act of 1972,
16 USC 1451 et seq.; (d) Rivers and Harbors Appropriation Act of 1899, 33 USC
401 et seq.; (e) Clean Water Act, 33 USC 1251 et seq.; (f) Flood Disaster
Protection Act of 1973, 42 USC 4001 et seq.; (g) National Environmental Policy
Act of 1969, 42 USC 4321 et seq.; (h) Resource Conservation and Recovery Act of
1976 (RCRA), 42 USC 6901 et seq.; (i) Clean Air Act, 42 USC 7401 et seq.; (j)
Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA),
42 USC 9601 et seq.; (k) Hazardous Materials Transportation Act, 49 USC 1801 et
seq.; (l) Safe Drinking Water Act, 42 USC 300f et seq.; (m) Emergency Planning
and Community Right-to-Know Act of 1986, 42 USC 11001 et seq.; (n) Federal
Insecticide, Fungicide, and Rodenticide Act, 7 USC 136 et seq.; (o) Occupational
Safety and Health Act, 29 USC 651 et seq.; and (p) all other federal, state,
county, municipal and local, foreign, and other statutes, laws, regulations, and
ordinances that


                                       10
<PAGE>   11

relate to or deal with pollution or protection of public or employee health and
safety or the environment, including, without limitation, laws relating to (i)
emissions, discharges, releases or threatened releases of Hazardous Substances
into the environment (including, without limitation, ambient air, surface water,
groundwater, land surface or subsurface strata), (ii) the manufacture,
processing, distribution, use, generation, treatment, storage, disposal,
transport or handling of hazardous materials, and (iii) underground and
aboveground storage tanks and related piping, and emissions, discharges,
releases or threatened released therefrom, all as may be amended from time to
time.

         For purposes of this Agreement, "Hazardous Substance" means (A) any
flammable or combustible substance, explosive, radioactive material, hazardous
waste, toxic substance, pollutant, contaminant, or any related materials or
substances identified in or regulated by any of the Environmental Laws; and (B)
asbestos, polychlorinated biphenyls (PCBs), urea formaldehyde, chemicals and
chemical wastes, explosives, known carcinogens, petroleum products and
by-products (including fractions thereof), and radon.

         (y) Insurance. The Company and each of the Subsidiaries maintain, and
continuously since January 1, 1996 have maintained, insurance covering their
properties, operations, personnel and businesses. Such insurance insures against
such losses and risks as are adequate in accordance with customary industry
practice to protect the Company and the Subsidiaries and their respective
businesses. All such insurance is outstanding and in force.

         (z) Certain Representations as to Real Estate Matters. The most recent
consolidated balance sheet and any notes thereto included in the financial
statements filed with the SEC by the Company reflect, in accordance with
generally accepted accounting principles, the real property owned (the "Owned
Property"), leased (the "Leased Property") or managed with an option to purchase
(the "Managed Property" and, collectively, with the Real Property and the Leased
Property, the "Real Property") by the Company and the Subsidiaries as of the
date thereof. The Company or a Subsidiary has good and marketable title to the
Owned Property, free and clear of any Liens, except for (i) mortgage liens,
security interests and equipment and vehicle leases securing repayment of
indebtedness of the Company or any of the Subsidiaries, (ii) statutory liens for
current taxes not yet delinquent, (iii) mechanics', carriers', workers',
repairers' and other similar liens imposed by law arising or incurred in the
ordinary course of business for obligations not yet due and payable, (iv) Liens
and other matters that are listed on Schedule 3.1(z) hereto or that will be
satisfied, discharged or removed at or prior to Closing, (v) easements,
rights-of-way, restrictions, minor defects or irregularities in title that do
not individually or in the aggregate interfere in any material respect with the
business of the Company, (vi) leases and/or subleases to joint venture entities
or partners entered into in the ordinary course of the Company's business on or
before December 31, 1999, and (vii) leases and/or subleases in the ordinary
course of business to operators of food service, medical, hair care,
recreational and other services and amenities for individual residents of the
Real Property (the matters described in clauses (i) through (vii) are together
called the "Permitted Encumbrances").

         The Company or a Subsidiary has a valid and binding leasehold interest
in each Leased Property free and clear of any Liens created by, through or under
the Company or a Subsidiary except for Permitted Encumbrances.


                                       11
<PAGE>   12

         The Company or a Subsidiary has a valid and binding management
agreement for each Managed Property.

         There are no eminent domain proceedings pending or threatened against
the Real Property or any material portion thereof which proceedings (if
resulting in a taking) could be expected, individually or in the aggregate, to
have a Material Adverse Effect on the use of such Real Property as currently
used in the operation of the business of the Company and the Subsidiaries. The
Real Property and the improvements thereon (including the roof and structural
portions of each building) are in good operating order and condition, subject to
ordinary wear and tear. There are no structural, mechanical or other defects of
a material nature in any improvements located on the Real Property. All building
systems in respect of the Real Property are in good condition and working order,
subject to ordinary wear and tear. The Real Property is served by all utilities
required or necessary for the present use thereof.

         (aa) ERISA. The Company and the Subsidiaries have complied in all
material respects with the applicable provisions of the Employee Retirement
Income Security Act of 1974, as amended ("ERISA"), and the Internal Revenue Code
of 1986, as amended (the "Code"), in connection with the Benefit Plans (as
defined below). No reportable event, as defined in Section 4043 of ERISA, has
occurred during the past five years with respect to any Benefit Plan that is
subject to Title IV of ERISA, except where notice for such reportable event is
waived by statutes or regulations. There have been no non-exempt prohibited
transactions under the Code or ERISA with respect to any Benefit Plan which
could result in a material liability to the Company or any Subsidiary. The
present value of all accrued benefits under each Benefit Plan subject to Title
IV of ERISA (based on the current liability, interest rate and other assumptions
used in preparation of the plan's Form 5500 Annual Report) did not, as of the
last annual valuation date, exceed the value of the assets of such plan
allocable to such accrued benefits, as of such date, by $100,000. Neither of the
Company, any Subsidiary, or any Commonly Controlled Entity (as defined below)
has any material liability with respect to any multiemployer plan (as defined in
Section 4001(a)(3) of ERISA). There are no material liabilities of the Company
or any Subsidiary for post-retirement benefits to be provided to their current
and former employees under Benefit Plans which are welfare benefit plans (as
described in Section 3(1) of ERISA), other than with respect to benefits
mandated by applicable law. With respect to each Benefit Plan, no event has
occurred and there exists no conditions or set of circumstances in connection
with which the Company or any Subsidiary may, directly or indirectly (through a
Commonly Controlled Entity or otherwise) be subject to material liability under
the Code, ERISA or any other applicable law, except for liability for benefit
claims, funding obligations and administrative expenses payable in the ordinary
course. For purposes of this paragraph, (i) "Commonly Controlled Entity" shall
mean any Person or entity that, together with the Company, any Subsidiary or any
Commonly Controlled Entity, is treated as a single employer under Section 414(b)
or (c), of the Code (or, solely for purposes of Section 302 of ERISA and Section
412 of the Code, Section 414(m) or (o) of ERISA), and (ii) "Benefit Plan" shall
mean any "employee benefit plan," as defined in Section 3(3) of ERISA, which is
maintained or contributed to by the Company, a Subsidiary or Commonly Controlled
Entity to which the Company, a Subsidiary or any Commonly Controlled Entity may
have liability.

         (bb) Labor Relations. Neither the Company nor any of the Subsidiaries
is a party to or bound by any labor agreement or collective bargaining agreement
respecting the employees of the Company or the Subsidiaries, nor is there
pending or, to the knowledge of the Company or


                                       12
<PAGE>   13

any Subsidiary, threatened, any strike, walkout, slowdown or other work stoppage
by the employees of the Company or any Subsidiary. No petition for certification
has been filed and is pending before the National Labor Relations Board with
respect to any employee of the Company or the Subsidiaries, the Company and the
Subsidiaries are in compliance, in all material respects, with all applicable
laws respecting employment practices, terms and conditions of employment and
wages and hours.

         (cc) Licenses. Each of the Company and the Subsidiaries holds all
material licenses, permits, approvals, certificates of inspection, other
authorizations, filings and registrations which are necessary for it to operate
its business as presently conducted (collectively, the "Licenses"). Except as
set forth on Schedule 3.1(cc) and except for instances in which such failure to
maintain good standing or proceedings do not and would not reasonably be
expected to materially and adversely affect the Company's or the Subsidiary's
ability to operate any residence to which such License relates, the Licenses are
in good standing and the Company has no knowledge that any disciplinary
proceeding in respect thereof is pending. Except as set forth on Schedule
3.1(cc), there is no proceeding pending, or to the knowledge of the Company or
any Subsidiary, threatened or probable of assertion to revoke or limit any such
Licenses. Upon obtaining the consents and approvals described on Schedule
3.1(g), none of the transactions contemplated by the Transaction Documents will
terminate, violate or limit the effectiveness of any such Licenses. With respect
to renewal of Licenses, the Company and the Subsidiaries have taken, in a timely
manner, all action known or anticipated to be required to be taken by the
Company and the Subsidiaries reasonably necessary to secure the renewal of the
Licenses prior to the date of their respective expirations. Neither the Company
nor any of the Subsidiaries has any information which would reasonably impact
their ability to secure the renewals of the Licenses prior to the date of their
respective expirations.

         (dd) Legal Compliance. Each of the Company and Subsidiaries has
complied and is in compliance with all applicable laws (including rules,
regulations, codes, plans, injunctions, judgments, orders, decrees, rulings, and
charges thereunder) of Federal, state, local and foreign governments (and all
agencies thereof) and of any self-regulatory agencies that regulate the Company
and/or the Subsidiaries, except where failure to so comply would not reasonably
be expected to have a Material Adverse Effect. Except as set forth in Schedule
3.1(dd), neither the Company nor any of the Subsidiaries has received any
notification of any asserted present or past failure by it to comply with such
laws, rules, regulations, codes, plans, injunctions, orders, decrees, rulings or
charges, except where failure to so comply would not, and would not reasonably
be expected to, have a Material Adverse Effect.

         (ee) Litigation; Proceedings. Except as set forth in Schedule 3.1(ee),
(i) there are no material actions, suits, proceedings, investigations or claims
(whether or not purportedly on behalf of the Company or any Subsidiary) pending
or, to the knowledge of the Company or any Subsidiary, threatened against the
Company or any Subsidiary, or the assets, business or goodwill of the Company or
any Subsidiary, in any court or before any arbitrator of any kind or before or
by any governmental or regulatory body or agency; and (ii) there is no material
outstanding order, writ, injunction or decree of or stipulation with any court,
arbitrator or governmental or regulatory body or agency against the Company or
any Subsidiary, or the assets, business or goodwill of the Company or any
Subsidiary.


                                       13
<PAGE>   14

         (ff)     Tax Matters.

                  (i) All Federal, state and local income, and all other
         material federal, state and local, tax returns and tax reports required
         as of the date hereof to be filed by the Company or any of the
         Subsidiaries for taxable periods ending prior to the date hereof and as
         of each of the Initial Closing and each Subsequent Closing, have been
         or will be duly and timely filed prior to the due date (as such date
         may be lawfully extended) by the Company with the appropriate
         governmental agencies, and all such returns and reports are true,
         correct and complete in all material respects.

                  (ii) All Federal, state and local income, and all material
         federal, state and local profits, franchise, sales, use, occupation,
         property, excise, payroll, withholding, employment, estimated and other
         taxes of any nature, including interest, penalties and other additions
         to such taxes ("Taxes"), payable by, or due from, the Company or any of
         the Subsidiaries for all periods prior to the date hereof and as of
         each of the Initial Closing and each Subsequent Closing, have been
         fully paid or adequately reserved for by the Company or any of the
         Subsidiaries, as applicable, or, with respect to Taxes required to be
         accrued, the Company has properly accrued or will properly accrue such
         Taxes in the ordinary course of business consistent with past practice
         of the Company.

                  (iii) (A) Neither the Company nor any of the Subsidiaries has
         received any notice of any assessed or proposed material claim or
         deficiency against it in respect of, or of any present material dispute
         between it and any governmental agency concerning, any Taxes; (B) no
         examination or audit of any material tax return or report of the
         Company or any of the Subsidiaries by any applicable taxing authority
         is currently in progress; and (C) there are no outstanding agreements
         or waivers extending the statutory period of limitation applicable to
         any material tax return or report of the Company or any of the
         Subsidiaries.

         (gg) Intellectual Property. Except as set forth in Schedule 3.1(gg) the
Company and the Subsidiaries own or have the right to use pursuant to license,
sublicense, agreement or permission all material trademarks, patents,
copyrights, trade names, service marks, software and know-how ("Intellectual
Property") necessary for the operation of its businesses as presently conducted.
Except as set forth in Schedule 3.1(gg), to the knowledge of the Company and the
Subsidiaries, neither the Company nor the Subsidiaries have interfered with or
otherwise come into conflict with any Intellectual Property rights of third
parties, nor has any third party interfered with, infringed upon,
misappropriated, or otherwise come into conflict with any Intellectual Property
rights of the Company or the Subsidiaries. Except as set forth in Schedule
3.1(gg), there is no existing claim or, to the knowledge of the Company and the
Subsidiaries, any basis for any claim against the Company or the Subsidiaries
(A) that any of its or the Subsidiaries' operations, activities or products
infringe the Intellectual Property or other property rights of others or (B)
that the Company or the Subsidiaries are wrongfully or otherwise using the
property rights of others.

         (hh) Title to Assets; Related Matters. The Company and the Subsidiaries
have good and marketable title to all of their respective material assets,
rights, interests and other properties, real, personal and mixed, tangible and
intangible, including, without limitation, capital leases and leasehold
interests and all of the assets in the audited consolidated balance sheet of the
Company


                                       14
<PAGE>   15

and the Subsidiaries as of December 31, 1999, except those transferred in the
ordinary course of business since December 31, 1999, are free and clear of all
encumbrances and liens except for Permitted Encumbrances, taxes not yet due and
payable and except as otherwise described in the Current SEC Documents.

         (ii) Submissions to AMEX for Waiver of Stockholder Vote Requirement.
The submissions made by the Company to the AMEX in connection with the request
by the Company for a waiver of the requirement of a stockholder vote to approve
the sale of the Securities and the consummation of any of the other transactions
contemplated by this Agreement which would have otherwise required such approval
under the rules and regulations of the AMEX are true and correct in all material
respects.

         (jj) Certain Financial Information. Attached hereto as Schedule
3.1(jj)-1 is an aged accounts payables of the Company as of April 24, 2000,
which schedule is true and correct in all material respects. Attached as
Schedule 3.1(jj)-2 is a weekly cash flow schedule through August 31, 2000
reflecting management's reasonable expectations with respect to future cash
flow. Attached hereto as Schedule 3.1(jj)-3 is a true and correct list of all
guaranties to which the Company is subject, which schedule is true and correct
in all material respects.

         Section 3.2. Representations and Warranties of Purchasers. Each
Purchaser, severally and not jointly, represents and warrants to the Company, as
of the date hereof, as follows:

         (a) Investment Intent. The Securities to be acquired hereunder, and the
Conversion Securities to be acquired upon conversion of any of the Securities
acquired hereunder, by such Purchaser are being, or will be, acquired for such
Purchaser's own account with no intention of distributing or reselling such
Securities or Conversion Securities or any part thereof or interest therein in
any transaction that would be in violation of the securities laws of the United
States or any State. It is understood that the certificates evidencing the
Securities may bear one or more legends, including a legend substantially as
follows:

                  The securities evidenced by this certificate have not been
                  registered under the Act, or applicable state securities law,
                  and no interest therein may be sold, distributed, assigned,
                  offered, pledged or otherwise transferred unless (i) there is
                  an effective registration statement under the Act and
                  applicable state securities laws covering any such transaction
                  involving said securities, (ii) this corporation receives an
                  opinion of legal counsel for the holder of these securities
                  reasonably satisfactory to this corporation stating that such
                  transaction is exempt from registration, or (iii) this
                  corporation otherwise satisfies itself that such transaction
                  is exempt from registration.

         (b) Purchaser Status. Such Purchaser is an "accredited investor" as
defined in Rule 501(a) under the Securities Act, has such knowledge,
sophistication and experience in business and financial matters so as to be
capable of evaluating the merits and risks of the prospective investment in the
Securities, has so evaluated the merits and risks of such investment and is able
to bear the economic risk of such investment and, at the present time, is able
to afford a complete loss of such investment.


                                       15
<PAGE>   16

         (c) Authorization; Execution. The purchase of the Securities to be
acquired hereunder by such Purchaser has been duly and properly authorized by
such Purchaser by all necessary action and the Transaction Documents to which it
is a party have been duly executed and delivered by it, and neither the purchase
of the Securities to be acquired hereunder nor the execution and performance of
the Transaction Documents conflicts with or violates any law, regulation or
court order applicable to it or any other agreement to which it is subject,
including, in the case of each Purchaser which is an entity, its governing
instruments.

         (d) Organization; Organizational Documents. In the case of each
Purchaser which is an entity, such Purchaser is a corporation, limited liability
company or limited partnership duly organized, validly existing and in good
standing under the laws of the state of its organization; has all requisite
power and authority to own and lease its properties and to carry on its business
as presently conducted except where a lack of such power would not reasonably be
expected to have a material adverse effect upon the financial condition,
business, or results of operations of such Purchaser; and has all the power and
authority necessary to execute, deliver and perform its obligations under the
Transaction Documents.

         (e) Consents; Governmental Approvals. No consent or approval of any
Person, firm or corporation, and no consent, license, approval or authorization
of, or registration, filing or declaration with, any governmental authority is
required to be obtained or made by or on behalf of such Purchaser in connection
with the purchase of the Securities, the execution, delivery or performance by
such Purchaser of any of the Transaction Documents or the completion of the
transactions contemplated thereby.

         (f) Binding Effect. Each of the Transaction Documents to which it is a
party is a legal, valid and binding obligation of such Purchaser, enforceable
against such Purchaser in accordance with its terms except as enforceability may
be limited by applicable bankruptcy, insolvency, reorganization, moratorium or
similar laws affecting the enforcement of creditors, rights generally or
limitations on the availability of equitable remedies.

         (g) Beneficial Ownership. To the best of such Purchaser's knowledge,
such Purchaser "beneficially owns" (as that term is used in Section 13(d) of the
Exchange Act) the number of shares of Common Stock set forth opposite such
Purchaser's name on Schedule 3.2(g) attached hereto.

         Section 3.3. Representations and Warranties of TPI Members. Each TPI
member, severally and not jointly, represents and warrants to the Company, as of
the date hereof and as of the Initial Closing Date, as follows:

         (a) Each TPI Member holds of record and owns beneficially its
respective TPI Membership Interest as set forth on Schedule 2.1(a) free and
clear of any restriction on transfer (other than any restrictions under
applicable federal and state securities laws), liens, encumbrances, options,
warrants, purchase rights, contracts, commitments, equities, demands, pledges or
other claims of any type except for the collateral assignments referred to in
Section 9.1(a) below. Each TPI Member is not a party to any option, warrant,
purchase right, or other contract or commitment that could require it to sell,
transfer or otherwise dispose of all or any part of its TPI Membership Interest
except for the collateral assignments referred to in Section


                                       16
<PAGE>   17
9.1(a) below, and each TPI Member has not otherwise sold, transferred or
conveyed any interest in or rights to its respective TPI Membership Interest to
any other Person except for the collateral assignments referred to in Section
9.1(a) below.

         Section 3.4. Representations and Warranties of TPI-HCR Assignees. Each
TPI-HCR Assignee, severally and not jointly, represents and warrants to the
Company, as of the Initial Closing Date, as follows:

         (a) Each TPI-HCR Assignee holds of record and owns beneficially the
TPI-HCR Membership Interest proposed to be assigned to the Company pursuant to
Section 8.1(a) hereof free and clear of any restriction on transfer (other than
any restrictions under applicable federal and state securities laws), liens,
encumbrances, options, warrants, purchase rights, contracts, commitments,
equities, demands, pledges or other claims of any type except for the collateral
assignments referred to in Section 8.1(a) below. No TPI-HCR Assignee is a party
to any option, warrant, purchase right, or other contract or commitment that
could require it to sell, transfer or otherwise dispose of all or any part of
its TPI-HCR Membership Interest except for the collateral assignments referred
to in Section 8.1(a) below, and no TPI-HCR Assignee has otherwise sold,
transferred or conveyed any interest in or rights to its respective TPI-HCR
Membership Interest to any other Person except for the collateral assignments
referred to in Section 8.1(a) below.

         Section 3.5. Survival of Representations and Warranties. The
representations and warranties of the parties in this Agreement and in any
document or certificate given pursuant to this Agreement shall survive the
Initial Closing or any Subsequent Closing, for a period of two years from the
Initial Closing Date, whereupon no further claim, including, without limitation,
a claim for indemnification pursuant to ARTICLE XI hereof, for a breach thereof
may be asserted.

                                   ARTICLE IV
                     CONDITIONS TO OBLIGATIONS OF PURCHASER

         In addition to the matters set forth in Article VI hereof, the
obligation of each Purchaser to purchase Securities hereunder on each of the
respective Closing Dates shall be subject to the satisfaction of each of the
following conditions precedent on each of the respective Closing Dates, except
to the extent waived in writing by such Purchaser:

         Section 4.1. Representations and Warranties True and Performance of
Agreements. Each of the representations and warranties made in this Agreement,
any other Transaction Document and in any other agreement, certificate or
instrument furnished to Purchasers in connection herewith shall be true and
correct in all material respects with the same force and effect as though such
representations and warranties had been made at the time of, and immediately
after giving effect to, the sale of Securities except to the extent that any
such representation or warranty was made as of a specified earlier date, in
which case such representation or warranty shall have been true and correct in
all material respect as of such specified date. The Company shall have performed
and complied, in all material respects, with each and every agreement, covenant
and condition required by this Agreement to be performed or complied with by it
prior to or on each of the Closing Dates. Purchaser shall have received on each
of the Closing Dates a certificate dated the applicable Closing Date signed by
the Chief Executive Officer and Chief Financial Officer of the Company to the
effect set forth in this Section 4.1.


                                       17
<PAGE>   18

         Section 4.2. No Material Adverse Change. No event, circumstance or
condition shall have occurred subsequent to the date of this Agreement and be
continuing that could reasonably be expected to have a Material Adverse Effect.

         Section 4.3. Suspension of Trading. Prior to or on each of the Closing
Dates, (i) trading in the Company's Common Stock shall not have been suspended
by the SEC or by the AMEX (except for any suspension of trading of limited
duration agreed to by the Company solely to permit dissemination of material
information regarding the Company), and trading in securities generally as
reported by AMEX shall not have been suspended or limited, or (ii) there shall
not have been declared a banking moratorium either by the United States or New
York State authorities.

         Section 4.4. Registration Rights Agreement. On or before the Initial
Closing Date, the Company shall have executed and delivered to Purchasers the
Registration Rights Agreement.

         Section 4.5. Legal Opinion. Purchasers shall have received on each of
the Closing Dates the executed legal opinion of Rogers & Hardin, counsel to the
Company, dated the applicable Closing Date in form and substance reasonably
acceptable to the Purchasers.

         Section 4.6. Affirmation of Senior Lender Construction Lines. Each
senior lender to the Company or any of its Subsidiaries identified in Schedule
4.6 shall have affirmed its unfunded commitment to the Company or Subsidiary
under the terms of the credit agreement set forth opposite the name of such
senior lender on Schedule 4.6 in form and substance reasonably satisfactory to
the Purchasers.

         Section 4.7. Additional Documents. Such Purchaser shall have received
all such agreements, documents, instruments, approvals, certificates, legal
opinions and information as such Purchaser shall reasonably request in
connection with the Transaction Documents, the Securities and the transactions
herein and therein contemplated, all of which shall be in form and in substance
reasonably satisfactory to such Purchaser and its counsel.

         Section 4.8. No Governmental Proceeding or Litigation. At each of the
Closing Dates, no order, injunction, decree or judgment of any court or
administrative agency shall be in effect which restrains or prohibits the
transactions contemplated hereby, and no suit, action, investigation, inquiry or
proceeding shall have been instituted, or threatened by any governmental agency
or any Person attacking the validity of this Agreement or seeking to enjoin the
consummation of the transactions contemplated hereby.

         Section 4.9. Appointment of Preferred Directors. Effective upon the
Initial Closing, the Preferred Directors, as defined in the Restated Bylaws,
shall have been elected as members of the Board of Directors of the Company and
a member of the Board (including any of the Preferred Directors) acceptable to
the Purchasers shall have been appointed as Chairman of the Company's Board of
Directors.

         Section 4.10. Amendment of Shareholder Rights Plan and Related Matters.
On or before the Initial Closing, the Company shall have amended the Rights Plan
in a manner reasonably acceptable to the Purchasers to provide that neither the
acquisition of the Securities


                                       18
<PAGE>   19

by any Purchaser, the acquisition pursuant to this Agreement of additional
Securities by any Purchaser pursuant to the payment of interest or dividends on
the Securities on a pay-in-kind basis nor the acquisition of Conversion
Securities by any Purchaser upon the conversion of the Securities will result
in, by virtue thereof, such Purchaser becoming an "Acquiring Person" pursuant to
the Rights Plan. On or before the Initial Closing, the Company shall have taken
such action as reasonably required by the Purchasers so that: (i) the holders of
the Series A Stock and Series B Stock will have rights to acquire additional
shares of Common Stock or Series B Stock which are substantially similar and
proportionate to the rights distributed to holders of Common Stock pursuant to
the Rights Plan; and (ii) the holders of Series A Debentures and Series B
Debentures will receive upon conversion of such Debentures into Common Stock or
Series B Stock, respectively, rights or additional shares, as the case may be,
as necessary so that the proportionate interests in the Company which they would
have been entitled to receive upon such conversion, but for the effect of the
distribution or exercise of rights distributed pursuant to the Rights Plan or
the immediately preceding clause (i), will not have been, or thereafter be,
diminished as a result of the distribution or exercise of such rights granted to
holders of Common Stock, Series A Stock or Series B Stock. The "Rights Plan"
means that certain plan implemented pursuant to the Rights Agreement between the
Company and American Stock Transfer & Trust Company, as rights agent, dated as
of December 10, 1998, as the same may be amended.

         Section 4.11. Waiver of Certain Change in Control Provisions. On or
prior to the Closing Date, William F. Lasky shall have waived in writing, to the
reasonable satisfaction of the Acting Purchasers, his right to special
termination benefits under his employment agreement with the Company that may be
available to him as a result of the consummation of the transaction contemplated
hereby being deemed a "change of control" (as that term is used in such
employment agreement).

         Section 4.12. Operations in Conformity with Financial Model. At the
Initial Closing, the Company shall be operating in material conformity with the
Company's current financial model provided to the Purchasers on or about April
21, 2000 (the "Financial Model"). Purchasers shall have received on the Initial
Closing Date a certificate signed by the Chief Executive Officer and the Chief
Financial Officer of the Company as to the effect set forth in this Section
4.12.

         Section 4.13. Loss of Properties or Assets. The Company shall not have
lost any interest in any asset or property in which it has an interest as of the
date hereof as a result of the foreclosure of any lien thereon (whether or not
such lien exists on the date hereof) or the enforcement of any lien thereon
(whether or not such lien exists on the date hereof) where the investment by the
Company or any Subsidiary in the interests so lost (if any) exceeds $500,000;
provided, however, the foregoing shall not apply to the loss of any asset or
property comprising a part of the Second Additional Collateral Real Estate (as
defined in the Second Amended and Restated Loan Agreement by and between the
Company and RDVEPCO, L.L.C. of even date herewith) if the loss is the result of
the Bridge Lender (hereinafter defined) unreasonably refusing to fund the Bridge
Loan (hereinafter defined).


                                       19
<PAGE>   20

                                    ARTICLE V
                     CONDITIONS TO THE COMPANY'S OBLIGATIONS

         In addition to the matters set forth in Article VI hereof, the
obligations of the Company under this Agreement to consummate the sale of the
Securities to be acquired by the Purchasers hereunder and the other transactions
contemplated hereby shall be subject to the satisfaction, on or before each of
the respective Closing Dates, of the following conditions except to the extent
waived in writing by the Company:

         Section 5.1. Representations and Warranties True. The representations
and warranties contained in Sections 3.2 and 3.3 hereof are true and accurate in
all material respects as of the date when made (or with respect to those
representations stated to be as of a different date, as of such date).

         Section 5.2. Performance of Agreements. Each Purchaser shall have
performed and complied, in all material respects, with each and every agreement
and condition required by this Agreement to be performed or complied with by it
prior to or on each of the Closing Dates.

         Section 5.3. No Governmental Proceeding or Litigation. At each of the
Closing Dates, no order, injunction, decree or judgment of any court or
administrative agency shall be in effect which restrains or prohibits the
transactions contemplated hereby, and no suit, action, investigation, inquiry or
proceeding by any governmental body, or legal or administrative proceeding by
any governmental body shall have been instituted, or threatened in writing,
which questions the validity or legality of the transactions contemplated
hereby.

         Section 5.4. Legal Opinion. Purchasers shall have delivered to the
Company on each of the Closing Dates the executed legal opinion of counsel to
Purchasers, dated the applicable Closing Date, in form and substance reasonably
satisfactory to the Company and its counsel.

         Section 5.5. Closing of Bridge Loan. The bridge funding under that
certain Second Amended and Restated Loan Agreement (the "Bridge Loan") by and
between the Company and RDVEPCO, L.L.C. of even date herewith shall have been
made by RDVEPCO, L.L.C. (the "Bridge Lender") in accordance with the terms of
such agreement.

         Section 5.6. Additional Documents. The Company shall have received all
such agreements, documents, instruments, approvals, certificates, legal opinions
and information as the Company shall reasonably request in connection with this
Agreement, the Securities and the transactions herein and therein contemplated,
all of which shall be in form and in substance reasonably satisfactory to the
Company and its counsel.

                                   ARTICLE VI
                     CONDITIONS TO EACH PARTY'S OBLIGATIONS

         In addition to the matters set forth in Articles IV and V hereof, the
respective obligations of the Company and the Purchasers to consummate the
purchase and sale of the Securities hereunder and the other transactions
contemplated hereby shall be subject to the satisfaction, on or before each of
the respective Closing Dates, of the following conditions, except to the extent
waived in writing by the Company and applicable Purchaser(s):


                                       20
<PAGE>   21

         Section 6.1. Hart-Scott-Rodino Compliance. To the extent applicable,
the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended, and the rules and regulations promulgated thereunder (the "HSR
Act") shall have expired or been terminated without action by the Justice
Department or the Federal Trade Commission to permit consummation of the
Purchasers' acquisition of the Securities and without the imposition of any
condition that would have a Material Adverse Effect after the respective Closing
Dates.

         Section 6.2. No Purchaser Default on Initial Closing Date. With respect
to the obligations of the parties to purchase and sell the Initial Securities,
none of the Purchasers shall have breached its obligation to purchase any of the
Initial Securities on the Initial Closing Date.

         Section 6.3. Continued AMEX Listing. The sale of the Securities and the
consummation of such of the other transactions contemplated by this Agreement
shall not adversely affect, or reasonably be expected to adversely affect, the
Company's AMEX listing.

         Section 6.4. Amendment of Certain Covenants. The Company shall have
secured in form and substance reasonably satisfactory to the Company and the
Acting Purchasers, or each of the Purchasers and the Company shall have waived,
on or prior to the Initial Closing Date, waivers or amendments to all material
credit, lease, financing or other agreements in order to (i) allow the Company
to consummate the transactions contemplated hereby without resulting in any
breach, default or material change in terms of any such agreements; (ii) extend
any material near term (prior to August 31, 2000) credit or debt maturities, the
repayment of which would impose a significant burden upon the Company's
operating liquidity; and (iii) with tolerances reasonably acceptable to the
Acting Purchasers, conform applicable financial covenants to the Financial
Model, and such amendments or waivers shall be in full force and effect.

                                   ARTICLE VII
                       ADDITIONAL COVENANTS OF THE COMPANY

         In addition to the other covenants and agreements of the Company set
forth in this Agreement, the Company covenants and agrees so long as the
Securities remain outstanding, unless expressly stated otherwise that:

         Section 7.1. Registration and Listing. The Company will use its best
efforts to cause its Common Stock to continue to be registered under Sections
12(b) or 12(g) of the Exchange Act, will comply in all respects with its
reporting and filing obligations under the Exchange Act, will comply with all
requirements related to any registration statement filed pursuant to this
Agreement and will not take any action or file any document (whether or not
permitted by the Securities Act or the Exchange Act or the rules thereunder) to
terminate or suspend such registration or to terminate or suspend its reporting
and filing obligations under such Acts. The Company will use its best efforts to
continue the listing or trading of its Common Stock on the AMEX, the New York
Stock Exchange or NASDAQ National Market and comply in all respects with the
Company's reporting, filing and other obligations under the bylaws or rules of
such exchange or NASDAQ, as the case may be.

         Section 7.2. Financial Statement and Information. The Company will
furnish or cause to be made available to each Purchaser (including, by arranging
that such Purchaser is notified of


                                       21
<PAGE>   22

SEC filings by the Company pursuant to an EDGAR watch service) the following
financial statements and information:

         (a) All reports and other written communications delivered by the
Company to its stockholders as such, and all registration statements (when
available to the public) and periodic reports filed by the Company with the SEC
or any securities exchange, pursuant to the Securities Act, the Exchange Act, or
the rules of such securities exchange.

         (b) The Company will permit each Purchaser or its representatives to
discuss such financial statements and reports with such officers of the Company
as the Purchaser or its representatives may reasonably designate.

         Section 7.3. Use of Proceeds.

         (a) Unless modified or altered by the Board of Directors, the Company
shall use the proceeds received from the sale of Securities as set forth in
Schedule 7.3.

         (b) The Company shall confirm the uses of the proceeds from the
issuance of the Securities to the Purchasers by delivery, on a calendar quarter
basis, of an officers' certificate executed by the chief executive officer and
the chief financial officer of the Company which sets forth in reasonable detail
the use of proceeds through the date of each such certificate. Such officers'
certificate shall be delivered to the Purchasers within 45 days after the last
day of each calendar quarter.

         Section 7.4. Public Announcements; Confidentiality. Except as agreed by
the Company and the Purchasers and except for such disclosures as may be
required by law, legal process or regulatory authority, no party hereto shall
issue any press release or otherwise make any announcement or disclosure
concerning the transactions herein contemplated unless such information is
already in the public domain.

         Section 7.5. Sales and Transfer Taxes. All transfer taxes incurred in
connection with this Agreement and the transactions contemplated hereby shall be
borne by the Company.

         Section 7.6. Conduct of Business. During the period from the date
hereof to the Initial Closing, except as otherwise expressly contemplated by
this Agreement or as the Purchasers shall otherwise consent to in writing (which
consent shall not be unreasonably withheld), the Company covenants and agrees
that it shall conduct, and will cause it Subsidiaries to conduct their
respective business in the ordinary and usual course consistent in all material
respects with the most recent financial model for the Company provided to the
Purchasers, and neither the Company nor the Subsidiaries shall take any action
except in the ordinary and usual course consistent in all material respects with
past practice. By way of amplification and not limitation, except as otherwise
expressly contemplated by this Agreement, or as the Acting Purchasers (as
hereinafter defined) shall otherwise consent to in writing (which consent shall
not be unreasonably withheld), the Company covenants and agrees that it shall
not, and it shall not permit the Subsidiaries to, do or propose to do any of the
following (except as expressly agreed herein):


                                       22
<PAGE>   23

                  (a) make any dividend or distribution in respect of the
         Company's capital stock or repurchase, redeem or otherwise acquire any
         of the Company's capital stock;

                  (b) sell, lease, transfer or dispose of all or substantially
         all of its assets;

                  (c) intentionally do any other act which would cause any
         representation or warranty of the Company in this Agreement to be or
         become untrue in any material respect;

                  (d) except as contemplated hereby with respect to filing of
         the Designation and adoption of the Restated Bylaws, amend the
         Company's Restated Certificate or Current Bylaws in a manner that would
         adversely affect the Purchasers or the transactions contemplated
         hereby;

                  (e) authorize for issuance, issue, sell, deliver, grant or
         issue any options, warrants, calls, subscriptions or other rights for,
         or otherwise agree or commit to issue, sell or deliver, any of the
         Company's capital stock or any securities convertible into or
         exchangeable or exercisable for its capital stock, except for options
         granted in the ordinary course of business consistent with past
         practice under the Company's Amended and Restated 1995 Incentive
         Compensation Plan or in connection with the exercise of any options
         granted under such plan;

                  (f) (i) increase in any manner the compensation of any of the
         Company's directors or employees, except in the ordinary course of
         business and consistent with past practice; (ii) pay or agree to pay
         any pension, retirement allowance or other employee benefit, or enter
         into any contract with any of the Company's past or present employees
         relating to any such pension, retirement allowance or other employee
         benefit, except as required under agreements, plans or arrangements
         existing as of the date hereof; (iii) grant any severance or
         termination pay to, or enter into any employment, consulting, or
         severance agreement with, any person (except in the ordinary course of
         business and consistent with past practice); (iv) enter into any
         material contract with any of the Company's past or present employees;
         and (v) except in the ordinary course of business and consistent with
         past practice, or as may be required to comply with applicable law,
         become obligated under any new pension plan, welfare plan,
         multiemployer plan, employee benefit plan, benefit arrangement, or
         similar plan or arrangement for the benefit of the Company's or the
         Subsidiaries' employees that was not in existence on or prior to the
         date hereof, including any bonus, incentive, deferred compensation,
         stock purchase, stock option, stock appreciation right, group
         insurance, severance pay, retirement or other benefit plan, contract,
         agreement or understanding, or amend any such plans or contracts in
         existence on or prior to the date hereof;

                  (g) authorize, recommend, propose or announce an intention to
         authorize, recommend or propose, or enter into any agreement in
         principle or an agreement with any other Person with respect to, any
         plan of liquidation or dissolution, any disposition of a material
         amount of assets or securities or any material change in the
         capitalization of the Company;


                                       23
<PAGE>   24

                  (h) except as set forth in Schedule 7.6(h), authorize or
         commit to make capital expenditures on the part of Company in excess of
         $5,000,000;

                  (i) maintain the Company's books and records in a manner not
         in the ordinary course of business and consistent with past practice;

                  (j) institute any change in the Company's accounting methods,
         principles or practices or revalue any of its assets, including without
         limitation, writing off notes or, except in the ordinary course of
         business consistent with past practice, writing down the value of
         property, plant and equipment;

                  (k) solicit or take any action with respect to any Financing
         Proposal in violation of the provisions of Article X;

                  (l) disclose any non-public information relating to the
         businesses, operations or affairs of the Company or any of its
         Subsidiaries in violation of the provisions of Article X; and

                  (m)  agree to do any of the foregoing.

         Section 7.7. Access to Information. From and after the Closing Date,
the Company shall permit the Purchasers to have full access to the Company's
books, records and personnel, provided that any information provided to the
Purchasers hereby shall be subject to the terms of the Confidentiality Agreement
by and between the Company and the Purchasers.

                                  ARTICLE VIII

                          TPI-HCR Membership Interests


         Section 8.1. Assignment of TPI-HCR Membership Interests; Release and
Indemnity.

         (a) On or prior to the Initial Closing Date, the Purchasers shall
acquire not less than 50.1% of the outstanding membership interests in TPI-HCR
(a "TPI-HCR Membership Interest") or shall have assigned their rights hereunder
to one or more Permitted Purchaser Assignees who, when taken together with the
Purchasers who own TPI-HCR Membership Interests on the Initial Closing Date,
shall own not less than 50.1% of the outstanding TPI-HCR Membership Interests.
Each Purchaser owning TPI-HCR Membership Interests on the Initial Closing Date,
together with any Permitted Purchaser Assignee thereof, shall assign its TPI-HCR
Membership Interest to the Company at the Initial Closing, and the Company shall
accept such assignment if, and only if, the Company is to receive by way of
assignment pursuant to this Section 8.1 a majority in interest of all the
outstanding TPI-HCR Membership Interests in accordance with this Section 8.1(a).
In consideration of any such assignment, each Purchaser, together with any
Permitted Purchaser Assignee thereof, who shall have assigned such TPI-HCR
Membership Interest to the Company (each a "TPI-HCR Assignee") shall be given
credit against the purchase price of the Initial Securities which such Purchaser
is committed to purchase pursuant to this Agreement in an amount equal to the
original capital contribution made in


                                       24
<PAGE>   25

respect of such TPI-HCR Membership Interest to TPI-HCR plus an amount computed
to provide a per annum return thereon of twenty-five percent (25%) compounded
annually using a year of 360 days (the "TPI-HCR Membership Interest Value")
through the Initial Closing Date (such return to be equal to the return payable
to such TPI-HCR Assignee were the call option under the applicable limited
partnership agreements exercised effective on the Initial Closing Date with
respect to all TPI-HCR Membership Interests transferred by such TPI-HCR
Assignee). The assignments made pursuant to this Section 8.1(a) shall be subject
to any collateral assignments to which such TPI-HCR Membership Interests are
subject that have been made to directly or indirectly secure any indebtedness or
lease obligations of the Company or any Subsidiary.

         (b) Each TPI-HCR Assignee, for itself and on behalf of its agents,
attorneys, representatives, affiliates, successors, and assigns, hereby
releases, waives, acquits, withdraws, retracts, and forever discharges any and
all claims, manner of actions, causes of action, in law or in equity, suits,
judgments, debts, liens, contracts, agreements, promises, liabilities, demands,
damages, losses, costs, expenses or disputes, known or unknown, fixed or
contingent (collectively, "Claims"), which it or any of them now have or may
have hereafter, directly or indirectly, in any capacity, against TPI-HCR, any
current, former or future managing member of TPI-HCR, the Company, and all and
any of their respective present or former Affiliates, Subsidiaries,
predecessors, successors and assigns, and each corporation, limited liability
company, limited partnership or other entity in which the Company has a direct
or indirect ownership interest as well as their respective present or former
agents, directors, officers, partners and employees, by reason of any act,
omission, matter, cause or thing whatsoever regarding such TPI-HCR Assignee's
respective TPI-HCR Membership Interests, from the beginning of time to, and
including, the Initial Closing Date.

         Section 8.2. Offer to Remaining Holders of TPI-HCR Membership
Interests. During the ninety (90) day period following the Initial Closing Date,
the Company shall offer, to all remaining holders of TPI-HCR Membership
Interests, to exchange for any or all of the TPI-HCR Membership Interests not
then owned by the Company, Debentures (Series A Debentures, Series B Debentures,
or any combination thereof, as designated by any such remaining holder of
TPI-HCR Member Interests electing to accept such offer) in an aggregate
principal amount equal to the TPI-HCR Membership Interest Value of the TPI-HCR
Membership Interests so exchanged through the date of closing of such exchange.

                                   ARTICLE IX
             PURCHASE RIGHTS AND CO-INVESTMENT RIGHTS OF TPI MEMBERS

         Section 9.1. Assignment of TPI Membership Interests; Release and
Indemnity.

         (a) Each of the Purchasers designated as a "TPI Member" on Schedule
2.1(a) (each a "TPI Member") hereby represent to the Company that they own the
membership interest in TPI (a "TPI Membership Interest") as described on
Schedule 2.1(a). At the Initial Closing, each TPI Member may assign its TPI
Membership Interest to the Company which shall accept such assignments if, and
only if, (i) all such TPI Members assign their respective TPI Membership
Interest to the Company and (ii) such TPI Members cause Twin Oaks Capital, LLC
to assign all TPI Membership Interests held by it to the Company on or prior to
the Initial Closing Date. Upon the effectiveness of such assignments, the
Company will amend and restate the TPI Amended and Restated Operating Agreement
as set forth on Exhibit E hereto. In consideration


                                       25
<PAGE>   26

of any such assignments, each TPI Member shall be given credit against the
purchase price of the Initial Securities which such TPI Member is committed to
purchase in an amount equal to the TPI Membership Interest Value of the TPI
Membership Interest assigned to the Company by such TPI Member. The TPI
Membership Interest Value of each TPI Membership Interest shall equal
$21,000,000 multiplied by the profit interest in TPI represented by such TPI
Membership Interest, reduced by the amount of any distribution after the date
hereof by TPI with respect to such TPI Membership Interest. The assignments made
pursuant to this Section 9.1(a) shall be subject to any collateral assignments
by the TPI Members of their respective TPI Membership Interest made to directly
or indirectly secure any indebtedness or lease obligations of the Company or any
Subsidiary.

         (b) Each TPI Member, for itself and on behalf of its agents, attorneys,
representatives, affiliates, successors, and assigns, hereby releases, waives,
acquits, withdraws, retracts, and forever discharges any and all Claims which it
or any of them now have or may have hereafter, directly or indirectly, in any
capacity, against TPI, any current, former or future managing member of TPI, the
Company, and all and any of their respective present or former Affiliates,
Subsidiaries, predecessors, successors and assigns, and each corporation,
limited liability company, limited partnership or other entity in which the
Company has a direct or indirect ownership interest as well as their respective
present or former agents, directors, officers, partners and employees, by reason
of any act, omission, matter, cause or thing whatsoever regarding such TPI
Member's respective TPI Member Interests, from the beginning of time to, and
including, the Initial Closing Date.

         Section 9.2. Purchase of TPI Membership Interests for Cash. In the
event of the termination of this Agreement by the Company pursuant to the
provisions of Section 12.1(d) or by the Purchasers pursuant to the provisions of
Sections 12.1(d) or 12.1(e), the Company covenants and agrees that neither it
nor any of its Subsidiaries shall enter into any transaction or series of
related transactions, including, but not limited to, any transaction pursuant to
a Superior Proposal, involving the issuance of equity securities of the Company
or any Subsidiaries or any debt securities of the Company or any of its
Subsidiaries which are exchangeable for or convertible into equity securities of
the Company or any of its Subsidiaries or which, in connection with the issuance
thereof, a Person shall be granted rights, options, warrants or other
instruments granting such Person the right to receive or acquire, with or
without further consideration, any of the equity securities of the Company or
any of its Subsidiaries and which (other than a transaction that is a Superior
Proposal) results in the receipt by the Company and its Subsidiaries within 180
days following such termination of this Agreement, directly or indirectly, of
aggregate consideration in excess of $25,000,000 without complying with the
provisions of this Section 9.2. Not later than the closing of any transaction
described in the preceding sentence, the Company shall be required to purchase
from the TPI Members for cash, and the TPI Members shall be required to assign
to the Company, their TPI Membership Interests for the TPI Membership Interest
Value thereof plus the assumption by the Company of the obligation of the TPI
Members to contribute additional capital to TPI. Such assignments may be made
subject to any collateral assignments by the TPI Members of their respective TPI
Membership Interest made to directly or indirectly secure any indebtedness or
lease obligations of the Company or any Subsidiary.


                                       26
<PAGE>   27

                                    ARTICLE X
                                  OTHER OFFERS

         Section 10.1. No Solicitation of Other Offers. Neither the Company nor
any of its Subsidiaries shall, directly or indirectly, knowingly take (and the
Company shall not authorize or permit its or its Subsidiaries' officers,
directors, employees, representatives, consultants, investment bankers,
attorneys, accountants or other agents or Affiliates, to so knowingly take) any
action to (i) encourage, solicit or initiate the submission of any Financing
Proposal (as hereinafter defined), (ii) enter into any agreement with respect to
any Financing Proposal, or (iii) participate in any way in discussions or
negotiations with, or, knowingly furnish any information to, any Person (other
than the Purchasers and their duly authorized representatives) in connection
with, or knowingly take any other action to facilitate any inquiries or the
making of any proposal that constitutes, or may reasonably be expected to lead
to, any Financing Proposal; provided, however, that (A) the Company may respond
to any unsolicited proposal from a third party for the sole purpose of
communicating that the Company is bound by this covenant, and (B) the Company
may participate in discussions or negotiations with or furnish information to
any third party which proposes a transaction which the Board of Directors of the
Company reasonably believes will result in a Superior Proposal if the Board of
Directors determines, in its good faith judgment (and has been advised by
independent legal counsel with respect thereto), that failing to take such
action would constitute a breach of its fiduciary obligations under applicable
law. In addition, neither the Board of Directors of the Company nor the Special
Committee shall withdraw or modify, or propose to withdraw or modify, in a
manner adverse to the Purchasers, the approval and recommendation of this
Agreement or approve or recommend, or propose to approve or recommend, any
Financing Proposal; provided that the Board of Directors of the Company and the
Special Committee may withdraw or modify its approval or recommendation of this
Agreement if (i) the Board of Directors of the Company and the Special Committee
have determined that such Financing Proposal is a Superior Proposal, (ii) all
the conditions to the Company's right to terminate this Agreement in accordance
with Section 12.1(d) have been satisfied (including the payment of the amounts
required by Section 13.2) and (iii) this Agreement is terminated in accordance
with Section 12.1(d). Any actions permitted under, and taken in compliance with,
this Section 10.1 shall not be deemed a breach of any covenant or agreement of
such party contained in this Agreement. "Financing Proposal" shall mean any
proposed merger or other business combination, sale or other disposition of any
material amount of assets, sale of shares of capital stock or securities
convertible into or exchangeable for shares of capital stock of the Company or
any Subsidiary, tender offer or exchange offer or similar transactions involving
the Company or any of its Subsidiaries other than pursuant to this Agreement.
"Superior Proposal" shall mean a bona fide Financing Proposal made by a third
party which a majority of the members of the Board of Directors of the Company
determines in its good faith judgment to be more favorable to the Company's
stockholders than the transactions contemplated hereby.

         Section 10.2. Notice to Purchasers. In addition to the obligations of
the Company set forth in Section 10.1, on the date of receipt thereof the
Company shall advise the Purchasers of any request for information or of any
Financing Proposal, or any proposal with respect to any Financing Proposal
(providing a copy of such request or proposal to the Purchasers), a summary of
the material terms and conditions of such request or proposal, and the identity
of the Person making any such proposal or inquiry. The Company will keep the
Purchasers fully informed in all material respects of the status and details
(including amendments or proposed amendments) of any such request, proposal or
inquiry and keep the Purchasers fully informed in all material respects as to
the


                                       27
<PAGE>   28

details of any information requested of or provided by the Company and as to the
details of all discussions or negotiations with respect to any such request,
proposal or inquiry.

         Section 10.3. Return of Confidential Information. Immediately following
the Initial Closing, the Company will request each Person which has heretofore
executed a confidentiality agreement in connection with its consideration of a
Financing Proposal to return or destroy all confidential information heretofore
furnished to such Person by or on behalf of the Company.

                                   ARTICLE XI
                                 INDEMNIFICATION

         Section 11.1.     Indemnification by the Company.

         (a) The Company shall indemnify and hold harmless each Purchaser and
its respective members, partners, directors, officers, employees, agents,
advisers (including legal, accounting and financial advisers), successors and
assigns from and against any and all Losses which may at any time (including,
without limitation, at any time following the repayment of the Debentures) be
imposed on, incurred by or asserted against them or any of them in whole or in
part arising out of or attributable to:

         (i)      subject to Section 3.5 hereof, the breach or incorrectness of
                  any representation and warranty of the Company set forth in
                  Section 3.1 of this Agreement;

         (ii)     the failure of the Company to perform any covenant or
                  agreement of the Company set forth in this Agreement; or

         (iii)    third party actions against such Purchaser as a result of
                  entering into this Agreement or consummating the transactions
                  contemplated hereby.

         (b) Each Purchaser shall promptly notify the Company in writing of the
occurrence of any event, or of its discovery of any facts, which in such
Purchaser's opinion entitle or may entitle it to indemnification hereunder. Such
Purchaser's failure to do so shall not preclude it from seeking indemnification
hereunder from the Company unless such failure has materially prejudiced the
Company's ability to defend as provided herein. With respect to any threatened
or asserted claims of third parties, the Company shall have the right to defend
such claims by counsel of its choosing and to direct or control the defense and
settlement thereof. Each Purchaser shall cooperate in all reasonable respects
with such counsel. In the event that the Company fails to defend or to
acknowledge its obligation to defend any claim which may entitle a Purchaser to
indemnification hereunder within ten (10) business days after notice from a
Purchaser of such claim, such Purchaser may, upon written notice to the Company,
elect to undertake the defense, compromise or settlement of such claim on behalf
and for the account and risk of the Company and without any requirement to
obtain the consent of the Company to any such compromise or settlement.

         (c) Notwithstanding the Company's election to assume the defense of a
claim, the applicable Purchaser shall have the right to employ separate counsel
and to participate in the defense of such claim, and the Company shall bear the
reasonable fees, costs and expenses of such separate counsel, if (i) the use of
counsel chosen by the Company to represent such

                                       28
<PAGE>   29

Purchaser would present such counsel with a conflict of interest, (ii) the
Company shall not have employed counsel reasonably satisfactory to such
Purchaser to represent such Purchaser within a reasonable time after notice of
the institution of such claim, or (iii) the Company shall authorize such
Purchaser to employ separate counsel at the Company's expense. If the Company
assumes the defense of a claim, no compromise or settlement thereof may be
effected by the Company without the applicable Purchaser's written consent
unless (a) there is no finding or admission of any violation of law and no
effect on any other claims that may be made against such Purchaser, and (b)
the sole relief provided is monetary damages that are to be paid in full by
the Company. For purposes of this Section 11.1, the term "Purchaser" shall
include the applicable Purchaser, any of its affiliates, each Person, if any,
controlling such Purchaser or any of its affiliates, their respective officers,
current and former directors, employees, partners, members and agents, and the
successors and assigns of all of the foregoing Persons.

         (d) The indemnity provided in this Section 11.1 shall be in addition to
any rights that the Purchasers may have against the Company under the Securities
Act, Exchange Act or state securities laws, common law, the Indenture, the
Designation or otherwise and no representation, warranty, covenant or
acknowledgment made herein by any Purchaser shall in any manner be deemed to
constitute a waiver of any rights granted to it under the Securities Act,
Exchange Act or state securities laws or in the Indenture or Designation.

         Section 11.2.     Indemnification by Purchaser.

         (a) Subject to Section 3.5 hereof, each Purchaser shall indemnify and
hold harmless the Company from and against any and all Losses suffered or
incurred by the Company as a result of the breach or incorrectness of any
representation and warranty of such Purchaser set forth in Section 3.2 or 3.3 of
this Agreement.

         (b) The Company shall promptly notify such Purchaser in writing of the
occurrence of any event, or of its discovery of any facts, which in the
Company's opinion entitle or may entitle it to indemnification hereunder. The
Company's failure to do so shall not preclude it from seeking indemnification
hereunder from such Purchaser unless such failure has materially prejudiced such
Purchaser's ability to defend as provided herein. With respect to any threatened
or asserted claims of third parties, a Purchaser shall have the right to defend
such claims by counsel of its choosing and to direct or control the defense and
settlement thereof. In the event that a Purchaser fails to defend or to
acknowledge its obligation to defend any claim which may entitle the Company to
indemnification hereunder within ten (10) business days after notice from the
Company of such claim, the Company may, upon written notice to such Purchaser,
elect to undertake the defense, compromise or settlement of such claim on behalf
and for the account and risk of such Purchaser and without any requirement to
obtain the consent of such Purchaser to any such compromise or settlement.

         (c) Notwithstanding a Purchaser's election to assume the defense of a
claim, the Company shall have the right to employ separate counsel and to
participate in the defense of such claim, and a Purchaser shall bear the
reasonable fees, costs and expenses of such separate counsel, if (i) the use of
counsel chosen by a Purchaser to represent the Company would present such
counsel with a conflict of interest,(ii) a Purchaser shall not have employed
counsel reasonably satisfactory to the Company to represent a Purchaser within a
reasonable time after notice of the institution of such claim, or (iii) a
Purchaser shall authorize the Company to employ


                                       29
<PAGE>   30

separate counsel at the Purchaser's expense. If a Purchaser assumes the defense
of a claim, no compromise or settlement thereof may be effected by such
Purchaser without the Company's written consent unless (a) there is no finding
or admission of any violation of law and no effect on any other claims that may
be made against the Company and (b) the sole relief provided is monetary damages
that are to be paid in full by the Purchaser. For purposes of this Section 11.2,
the term "Company" shall include the Company, any of its affiliates, each
Person, if any, controlling the Company or any of its affiliates, their
respective officers, current and former directors, employees, partners, members
and agents, and the successors and assigns of all of the foregoing Persons. The
foregoing indemnity agreement shall be in addition to any rights that the
Company may have at common law or otherwise.

         (d) The indemnity provided in this Section 11.2 shall be in addition to
any rights that the Company may have against a Purchaser under common law or
otherwise.

                                   ARTICLE XII
                                   TERMINATION

         Section 12.1. Termination. This Agreement may be terminated and the
transactions contemplated hereby may be abandoned, at any time prior to the
Initial Closing:

         (a) by mutual written consent of the Company and Purchasers obligated
hereunder to purchase Initial Securities aggregating at least $90,000,000 (such
Purchasers, the "Acting Purchasers");

         (b) by either Acting Purchasers, on the one hand, or the Company, on
the other hand, if any governmental or regulatory agency shall have issued an
order, decree or ruling or taken any other action permanently enjoining,
restraining or otherwise prohibiting the consummation of the transactions
contemplated hereby and such order, decree or ruling or other action shall have
become final and nonappealable;

         (c) by either Acting Purchasers, on the one hand, or the Company, on
the other hand, if the Initial Closing shall not have occurred by May 31, 2000,
but neither such Acting Purchasers on the one hand, or Company on the other
hand, shall have the right to terminate this Agreement pursuant to this Section
12.1(c) if it has or they have intentionally or willfully materially breached
any representation or warranty on its or their part set forth in this Agreement
or materially breached any covenant or agreement on its or their part set forth
in this Agreement and failed to cure the same within ten days after written
notice thereof;

         (d) by either the Acting Purchasers, on the one hand, or the Company,
on the other hand, if the Board of Directors of the Company and if required, the
Special Committee, determines in its good faith judgment that a Financing
Proposal will result in a Superior Proposal and the Board of Directors
determines in its good faith judgment (and has been advised by independent legal
counsel with respect thereto) that a failure to terminate this Agreement and
enter into an agreement to effect the Superior Proposal would constitute a
breach of its fiduciary obligations under applicable law; provided, however the
Company may not terminate this Agreement pursuant to this Section 12.1(d) unless
(i) the Company has given reasonably prompt written notice to the Purchasers of
the receipt of such Financing Proposal and following such notification by the
Company to Purchasers of receipt of such Financing Proposal the Company keeps
the Purchasers




                                       30
<PAGE>   31

reasonably informed of the terms and conditions of such Financing Proposal (and
any modification thereto), and the identity of the Person making such Proposal,
(ii) simultaneously with the consummation of the transaction contemplated by
such Superior Proposal (as the same may be amended or modified), the Company
shall pay the aggregate $5,000,000 amount pursuant to Section 13.2 as provided
therein, and (iii) prior to or simultaneously with such termination the Company
enters into a definitive agreement to effect the Superior Proposal;

         (e) by Acting Purchasers if (i) there shall have been a material breach
of any representation or warranty on the part of the Company contained in this
Agreement, (ii) there shall have been a material breach of any covenant or
agreement on the part of the Company contained in this Agreement and the Company
has failed to cure such breach within ten days after written notice thereof from
Acting Purchasers, or (iii) the Board of Directors of the Company or the Special
Committee shall have withdrawn or modified in a manner adverse to the Purchasers
its approval or recommendation of this Agreement and shall not have reinstated
such approval or recommendation within three business days thereof;

         (f) by Acting Purchasers if the Company shall have entered into a
definitive agreement to effect a Superior Proposal; or

         (g) by the Company if (i) any of the representations and warranties of
any of the Purchasers contained in this Agreement were untrue or incorrect in
any material respect when made or have since become, and at the time of
termination remain, incorrect in any material respect, or (ii) any of Purchasers
shall have breached or failed to comply in any material respect with any of
their respective obligations under this Agreement.

         Section 12.2. Effect of Termination. In the event of the termination of
this Agreement pursuant to Section 12.1 hereof by Acting Purchasers, on the one
hand, or the Company, on the other hand, written notice thereof shall forthwith
be given to the other party or parties specifying the provision hereof pursuant
to which such termination is made, and this Agreement shall become void and have
no effect, and there shall be no liability hereunder on the part of Purchasers
or the Company, except (i) in the case of any termination pursuant to Section
12.1(e) or Section 12.1(g), liability of the breaching party for contract
damages, and (ii) as otherwise provided in Section 12.1(d) and Section 13.2,
which provisions, together with Sections 7.4, 9.2, this Section 12.2, Article
XI, Article XIII and Article XIV, shall survive any termination of this
Agreement.

                                  ARTICLE XIII
                           COSTS AND EXPENSES; DAMAGES

         Section 13.1. Costs and Expenses. Except as provided Sections 13.2 and
13.3, all costs and expenses incurred in connection with this Agreement and the
consummation of the transactions contemplated hereby shall be paid by the party
incurring such costs and expenses.

         Section 13.2. Liquidated Damages. If this Agreement is terminated by
the Company pursuant to Section 12.1(d) or by the Acting Purchasers pursuant to
Sections 12.1(d) or 12.1(f), then in addition to the amounts payable to the
Purchasers pursuant to Section 13.3, the Company shall pay to certain of the
Purchasers upon consummation of any such Superior Proposal as liquidated damages
the aggregate sum of $5,000,000 by wire transfers in same day funds to the
accounts specified in writing by such Purchasers and in the proportions
identified in Schedule 13.2.


                                       31
<PAGE>   32

         Section 13.3. Reimbursement of Expenses. Whether or not the
transactions contemplated hereby are consummated, the Company agrees to
reimburse the Purchasers for all reasonable out-of-pocket fees and expenses
incurred by each of them in connection with the negotiation of the terms and
conditions of the Securities and this Agreement and related due diligence not
otherwise reimbursed by the Company, including, but not limited to, filing fees
under the HSR Act, attorneys fees, accountant fees, and other professional
advisor fees, provided that any such expenses in excess of $750,000 will be
subject to the Company's approval, which approval shall not be unreasonably
withheld.

                                   ARTICLE XIV
                                  MISCELLANEOUS

         Section 14.1. No Waiver; Modifications in Writing. (a) No failure or
delay on the part of the Company or any Purchaser in exercising any right, power
or remedy hereunder shall operate as a waiver thereof, nor shall any single or
partial exercise of any such right, power or remedy preclude any other or
further exercise thereof or the exercise of any other right, power or remedy.
The remedies provided for herein are cumulative and are not exclusive of any
remedies that may be available to the Company or Purchasers at law or in equity.
No waiver of or consent to any departure by the Company or Purchasers from any
provision of this Agreement shall be effective unless in writing and signed by
the party entitled to the benefit thereof. Except for action by Acting
Purchasers as specifically provided in Sections 4.11, 6.4 and 7.6 or in Article
XII hereof, no amendment, modification or termination of any provision of this
Agreement shall be effective unless in writing and signed by or on behalf of the
Company and the Purchasers. Any amendment, supplement or modification of or to
any of this Agreement, any waiver of any provision of this Agreement, and any
consent to any departure from the terms of any provision of this Agreement,
shall be effective only in the specific instance and for the specific purpose
for which made or given.

         Section 14.2. Notices. All notices and other communications required or
permitted under this Agreement shall be in writing and, if mailed by prepaid
registered or certified mail, return receipt requested, shall be deemed to have
been received on the earlier of the date shown on the receipt or three (3)
Business Days after the post-mark date thereof. Notices may be given by
recognized overnight courier services and shall be deemed to have been received
as of the regularly scheduled time for delivery established by such courier
service. In addition, notices hereunder may be delivered by hand in which event
the notice shall be deemed effective when delivered or by telecopy in which case
it shall be deemed effective upon confirmation of transmission. All notices and
other communications under this Agreement shall be given to the parties hereto
at the following addresses:

              If to Company:

                    Alterra Healthcare Corporation
                    10000 Innovation Drive
                    Milwaukee, Wisconsin 53226
                    Attention: President
                    Fax: (414) 918-5055


                                       32
<PAGE>   33

              With a copy to:

                  Rogers & Hardin
                  2700 International Tower
                  229 Peachtree Street, N.E.
                  Atlanta, Georgia, 30303
                  Attn: Alan Leet, Esq.
                  Fax: (404) 525-2224

              If to Purchasers:

                  RDVEPCO, L.L.C.
                  c/o RDV Corporation
                  126 Ottawa Avenue, N.W.
                  500 Grand Bank Building
                  Grand Rapids, Michigan 49503
                  Attention: Robert H. Schierbeek, Treasurer
                  Fax: (616) 454-4654

                  and

                  Group One Investors, L.L.C.
                  c/o RDV Corporation
                  126 Ottawa Avenue, N.W.
                  500 Grand Bank Building
                  Grand Rapids, Michigan 49503
                  Attention: Robert H. Schierbeek, Treasurer
                  Fax: (616) 454-4654

                  and

                  Holiday Retirement 2000, LLC
                  c/o Emeritus Corporation
                  3131 Elliott Avenue
                  Suite 500
                  Seattle, Washington  98121
                  Attention: Dan Baty
                  Fax: (206) 378-4205

         With a copy to:

                  Hecht & Lentz
                  333 Bridge, N.W., Suite 330
                  Grand Rapids, MI 49504
                  Attention: David M. Hecht, Esq.
                  Fax: (616) 776-7203


                                       33
<PAGE>   34

                  and

                  Warner, Norcross & Judd LLP
                  111 Lyon Street, N.W.
                  900 Old Kent Building
                  Grand Rapids, Michigan 49503-2487
                  Attention: Bruce C. Young, Esq.
                  Fax: (616) 752-2500

Any party hereto may change the address to which notices shall be directed under
this Section by giving written notice of such change to the other parties.

         Section 14.3. Facsimile Signature; Execution in Counterparts. This
Agreement may be executed and delivered (including by facsimile transmission) in
any number of counterparts and by different parties hereto on separate
counterparts, each of which counterparts, when so executed and delivered, shall
be deemed to be an original and all of which counterparts, taken together, shall
constitute but one and the same Agreement.

         Section 14.4. Binding Effect; Assignment. The rights of Purchasers
under this Agreement may not be assigned to any other Person except with the
prior written consent of the Company, which consent shall not be withheld
unreasonably; provided, however, notwithstanding the foregoing to the contrary,
a Purchaser may assign its right to purchase the Initial Securities to otherwise
be purchased by such Purchaser pursuant to this Agreement to any Person who
holds a TPI Membership Interest or a TPI-HCR Membership Interest (a "Permitted
Purchaser Assignee"), but no such assignment shall in any way relieve such
Purchaser of its obligations hereunder. The rights of the Company under this
Agreement may not be assigned. This Agreement shall be binding upon the Company
and Purchasers, and their respective successors and permitted assigns. This
Agreement shall not be construed so as to confer any right or benefit upon any
Person other than the parties to this Agreement, and their respective successors
and permitted assigns.

         Section 14.5. Governing Law. This Agreement shall be deemed to be a
contract made under the laws of the State of Michigan, and for all purposes
shall be construed in accordance with the laws of said state, without regard to
principles of conflicts of laws.

         Section 14.6. Specific Performance. Upon breach or default by the
Company with respect to any obligation hereunder, each Purchaser (or its agents)
shall be entitled to protect and enforce its rights at law, or in equity or by
other appropriate proceedings for specific performance of such obligation, or
for an injunction against such breach or default, or in aid of the exercise of
any power or remedy granted hereby or thereby or by law.

         Section 14.7.     Submission to Jurisdiction; Venue.

         (a) Any legal action or proceeding with respect to this Agreement may
be brought in the courts of the State of Michigan or of the United States for
the Western District of Michigan and, by execution and delivery of this
Agreement, the Company and each of the Purchasers hereby irrevocably accepts for
itself and in respect of its property, generally and unconditionally, the
nonexclusive jurisdiction of the aforesaid courts. The Company and each of the
Purchasers


                                       34
<PAGE>   35

further irrevocably consents to the service of process out of any of the
aforementioned courts in any such action or proceeding by the mailing of copies
thereof by registered or certified mail, postage prepaid, to the address of such
party set forth in Section 14.2, such service to become effective 30 days after
such mailing. Nothing herein shall affect the right of any party to serve
process in any other manner permitted by law or to commence legal proceedings or
otherwise proceed against the Company in any other jurisdiction.

         (b) The Company and each of the Purchasers hereby irrevocably waives
any objection which it may now or hereafter have to the laying of venue of any
of the aforesaid actions or proceedings arising out of or in connection with
this Agreement brought in the courts referred to in clause (a) above and hereby
further irrevocably waives and agrees not to plead or claim in any such court
that any such action or proceeding brought in any such court has been brought in
an inconvenient forum.

         Section 14.7. Severability of Provisions. Any provision of this
Agreement that is prohibited or unenforceable in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions hereof or
affecting the validity or enforceability of such provision in any other
jurisdiction.

         Section 14.8. Terms Generally. The definitions of terms herein shall
apply equally to the singular and plural forms of the terms defined. Whenever
the context may require, any pronoun shall include the corresponding masculine,
feminine and neuter forms. The words "include", "includes" and "including" shall
be deemed to be followed by the phrase "without limitation". The word "will"
shall be construed to have the same meaning and effect as the word "shall".
Unless the context requires otherwise, (a) any definition of or reference to any
agreement, instrument or other document herein shall be construed as referring
to such agreement, instrument or other document as from time to time amended,
supplemented or otherwise modified (subject to any restrictions on such
amendments, supplements or modifications set forth herein), (b) any reference
herein to any Person shall be construed to include such Person's successors and
assigns, (c) the words "herein", "hereof" and "hereunder", and words of similar
import, shall be construed to refer to this Agreement in its entirety and not to
any particular provision hereof, and (d) all references herein to sections,
Schedules and Exhibits shall be construed to refer to sections of, and Schedules
and Exhibits to, this Agreement.

         Section 14.9. Headings. The Article and Section headings used or
contained in this Agreement are for convenience of reference only and shall not
affect the construction of this Agreement.

         Section 14.10. No Reliance. Each party hereto acknowledges that it has
obtained separate advice with respect to the legal, tax and accounting
consequences of the transactions contemplated by this Agreement, and that it has
neither sought nor relied upon any such advice from any other party hereto or
its Affiliates.

         Section 14.11. Entire Agreement. This Agreement and the other
Transaction Documents constitute the entire agreement among the parties with
respect to the purchase and sale of the Securities to be acquired by Purchasers
hereunder, and, as of the date hereof, there are no promises or undertakings
with respect thereto relative to the subject matter hereof not expressly set
forth or referred to herein or therein.


                                       35
<PAGE>   36

         Section 14.12. Further Assurances. The Company and the Purchasers each
will execute and deliver or cause to be executed and delivered such further
instruments and do or cause to be done such further acts as may be reasonably
necessary to carry out their respective obligations under this Agreement.

         **************************************************************


                                       36
<PAGE>   37

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the date first above written.


                      ALTERRA HEALTHCARE CORPORATION


                               By: /s/ William F. Lasky
                                  -------------------------------------------

                               Name:  William F. Lasky
                               Title:  Chief Executive Officer and President

                      RDVEPCO, L.L.C.
                               By: RDV Altco, L.L.C., a member
                               By: RDV Corporation, a member

                               By: /s/ Jerry L. Tubergen
                                  -------------------------------------------
                               Name:  Jerry L. Tubergen
                               Title: President

                               By: EDP Assisted Living Properties, L.L.C.,
                                        a member
                               By: Elsa D. Prince Living Trust u/a dated
                                        January 24, 1976

                               By: /s/ Elsa D. Prince
                                  -------------------------------------------
                               Name: Elsa D. Prince
                               Title: Trustee

                      GROUP ONE INVESTORS, L.L.C.
                               By: RDV Corporation, its manager

                               By: /s/ Jerry L. Tubergen
                                  -------------------------------------------
                               Name:  Jerry L. Tubergen
                               Title: President

                      HOLIDAY RETIREMENT 2000, LLC


                               By: /s/ Daniel R. Baty
                                  -------------------------------------------
                               Name:  Daniel R. Baty
                               Title: a member



                                       37


<PAGE>   38
                                  EXHIBIT A-1

                          CERTIFICATE OF DESIGNATIONS,
                             RIGHTS AND PREFERENCES

                                     OF THE

                                 SERIES A 9.75%

                             CUMULATIVE CONVERTIBLE

                          PAY-IN-KIND PREFERRED STOCK

                                       OF

                         ALTERRA HEALTHCARE CORPORATION


                  1.       Designation. The Preferred Stock of Alterra
Healthcare Corporation (the "Corporation"), created and authorized for issuance
hereby, shall be designated as "Series A 9.75% Cumulative Convertible
Pay-In-Kind Preferred Stock" (hereinafter, "Series A Preferred Stock") which
will consist of ________ shares of such Series A Preferred Stock, each of which
has a stated value of $4.00 per share (the "Stated Value").

                  2.       Priority. The Series A Preferred Stock shall, with
respect to dividend rights and rights on liquidation, winding up or
dissolution, whether voluntary or involuntary, whether now or hereafter issued,
rank (i) senior to (A) any other class or series of Preferred Stock of the
Corporation ("Preferred Stock") established by the Board of Directors of the
Corporation (the "Board of Directors"), including the Corporation's Series A
Junior Participating Preferred Stock (the "Series A Junior Preferred Stock")
and the Corporation's Series B Non-Voting Participating Preferred Stock (the
"Series B Preferred Stock") but specifically excluding any Equivalent
Securities (hereinafter defined) or Senior Securities (hereinafter defined)
issued in accordance with Section 5 hereof, (B) the Corporation's Common Stock,
$.01 par value per share (the "Common Stock"), and (C) any other equity
securities of the Corporation (all of such equity securities of the Corporation
to which the Series A Preferred Stock ranks senior, including the Common Stock,
the Series A Junior Preferred Stock and the Series B Preferred Stock, are at
times collectively referred to herein as the "Junior Securities").
<PAGE>   39

                  3.       Dividends.

                           (a)      Holders of shares of Series A Preferred
Stock shall be entitled to receive cumulative dividends for each share of
Series A Preferred Stock at an annual rate (the "Dividend Rate") of 9.75% of
the Stated Value (unless such rate has been adjusted pursuant to the provisions
of Section 3(d)), payable semi-annually on July 31 and January 1 of each year
(or at such additional times and for such interim periods, if any, as
determined by the Board of Directors) (each of such dates being referred to
herein as a "Dividend Payment Date"), except that if such date is a Saturday,
Sunday or legal holiday, then such dividend shall be payable on the next date
that is not a Saturday, Sunday or legal holiday on which banks in the State of
New York are permitted or required to be closed (a "Business Day"). Each of
such semi-annual dividends shall be fully cumulative and shall accrue (whether
or not declared), on a daily basis from the first day of the period in which
such dividend may be accruable as provided herein; provided, however, that with
respect to the first Dividend Payment Date following any issuance of shares of
Series A Preferred Stock, the dividend with respect to such shares shall accrue
from the date of issuance of such shares of Series A Preferred Stock. Dividends
on shares of Series A Preferred Stock shall be payable in shares of Series A
Preferred Stock (calculated with reference to the Stated Value of the Series A
Preferred Stock). The Board of Directors shall declare and pay such accrued
dividends at such time and to the extent permitted by law. No fractional shares
shall be issued by the Corporation in respect of any Dividend Payment Date, so
that the number of shares of Series A Preferred Stock to be paid as a dividend
pursuant to this Section 3(a) to a holder of Series A Preferred Stock shall be
rounded down to the nearest whole number of shares; provided however, that any
such fractional shares to which a holder of Series A Preferred Stock would
otherwise be entitled shall be aggregated with any fractional shares otherwise
issuable in connection with any subsequent Dividend Payment Dates and each time
such fractional shares shall equal one full share, such full share shall be
issued to the holder entitled thereto on the next subsequent Dividend Payment
Date with all attendant rights and preferences attaching thereto. Dividends
shall be paid to the holders of record of shares of Series A Preferred Stock at
the close of business on the date specified by the Board of Directors at the
time such dividend is declared (the "Record Date"); provided, however, that
such Record Date shall not be more than 60 days nor less than 10 days prior to
the respective Dividend Payment Date. The Corporation shall deliver or cause to
be delivered to the respective record holders of shares of Series A Preferred
Stock certificates representing the shares of Series A Preferred Stock (if any)
to which they are entitled pursuant to this Section 3(a) promptly following
each Dividend Payment Date.

                           (b)      All dividends paid with respect to shares
of Series A Preferred Stock pursuant to Section 3(a) hereof shall be paid pro
rata to the holders entitled thereto. All shares of Series A Preferred Stock
issued in respect of any



                                       2
<PAGE>   40

Dividend Payment Date shall be deemed issued on the applicable Dividend Payment
Date, and will thereupon be duly authorized, validly issued, fully paid and
non-assessable and free and clear of all liens and charges. On and after a
Dividend Payment Date, until certificates representing additional shares of
Series A Preferred Stock, shall have been issued pursuant to Section 3(a)
hereof, the certificates representing shares of Series A Preferred Stock held
by a holder of Series A Preferred Stock on the Record Date shall represent not
only such existing shares, but also the additional shares of Series A Preferred
Stock issued to such holder pursuant to such dividend.

                           (c)      (i)      Holders of shares of Series A
Preferred Stock shall be entitled to receive the dividends provided for in
Section 3(a) hereof in preference to and in priority over any dividends
declared upon any of the Junior Securities.

                                    (ii)     So long as any shares of Series A
Preferred Stock are outstanding, the Corporation shall not declare, pay or set
apart for payment any dividend on any of the Junior Securities or make any
payment on account of, or set apart for payment money or establish a sinking or
other similar fund for, the purchase, redemption, retirement or other
acquisition of, or otherwise acquire for value, any of the Junior Securities or
any warrants, rights, calls or options exercisable for any of the Junior
Securities, or make any distribution in respect thereof, either directly or
indirectly, whether in cash, obligations or shares of the Corporation or other
property (other than distributions or dividends payable solely in the same
Junior Securities to the holders of such Junior Securities), and permit any
company or other entity directly or indirectly controlled by the Corporation to
purchase or redeem any of the Junior Securities or any warrants, rights, calls
or options exercisable for any of the Junior Securities, unless prior to or
concurrently with such declaration, payment, setting apart for payment,
purchase, redemption or distribution, as the case may be, all accrued and
unpaid dividends, if any, on shares of Series A Preferred Stock not paid on the
dates provided for in Section 3(a) hereof shall have been paid.

                                    (iii)    Subject to the foregoing
provisions of this Section 3 and the provisions of Section 8(f) hereof, the
Board of Directors may declare and the Corporation may pay or set apart for
payment dividends and other distributions on any of the Junior Securities, and
may purchase or otherwise redeem any of the Junior Securities or any warrants,
rights or options exercisable for any of the Junior Securities, and the holders
of the shares of Series A Preferred Stock shall not be entitled to participate
therein.



                                       3
<PAGE>   41

                           (d)      If at any time the Common Stock is not
listed or admitted to trading on the American Stock Exchange, the New York
Stock Exchange or the NASDAQ National Market System (each a "National
Exchange"), then beginning on the date the Common Stock is no longer so listed
or admitted to trading and continuing until the date the Common Stock is again
listed or admitted to trading on a National Exchange, the Dividend Rate shall
be adjusted to an annual rate of 12.25% of the Stated Value.

                  4.       Liquidation Preference.

                           (a)      In the event of any voluntary or
involuntary liquidation, dissolution or winding up of the affairs of the
Corporation, the holders of shares of Series A Preferred Stock then outstanding
shall be entitled to be paid out of the assets of the Corporation available for
distribution to its stockholders an amount in cash equal to the Stated Value
for each share outstanding, plus an amount in cash equal to all accrued but
unpaid dividends thereon to the date fixed for liquidation, before any payment
shall be made or any assets distributed to the holders of any of the Junior
Securities (the "Liquidation Preference"). No full preferential payment on
account of any liquidation, dissolution or winding up of the Corporation,
whether voluntary or involuntary, shall be made to the holders of any class of
Equivalent Securities (as hereinafter defined in Section 5 below) unless there
shall likewise be paid at the same time to holders of Series A Preferred Stock
the full amounts to which such holders are entitled with respect to such
distribution. If the assets of the Corporation are not sufficient to pay in
full the liquidation payments payable to the holders of outstanding shares of
Series A Preferred Stock and outstanding shares of Equivalent Securities, then
the holders of all such shares shall share ratably in such distribution of
assets in accordance with the full respective preferential amounts that would
be payable on such shares of Series A Preferred Stock and such shares of
Equivalent Securities if all amounts payable thereon were paid in full.

                           (b)      For the purposes of this Section 4, (i) the
voluntary sale, conveyance, exchange or transfer (for cash, shares of stock,
securities or other consideration) of all or substantially all of the property
or assets of the Corporation (unless and until such sale, conveyance, exchange
or transfer is followed by the dissolution of the Corporation pursuant to the
DGCL) or (ii) the consolidation or merger of the Corporation with one or more
other companies or entities shall not be deemed to be a liquidation,
dissolution or winding up, voluntary or involuntary.

                  5.       Certain Restrictions.

                  Notwithstanding anything contained herein to the contrary, so
long as any shares of the Series A Preferred Stock shall remain outstanding,
the Corporation shall not, without first obtaining the consent or approval of
the holders of a majority



                                       4
<PAGE>   42

of the then outstanding shares of Series A Preferred Stock, establish, create,
authorize or issue any shares of (i) any class or series of Preferred Stock the
terms of which provide that such class or series shall rank on parity with the
Series A Preferred Stock with respect to dividends or rights on liquidation,
winding up or dissolution ("Equivalent Securities"), including (A) the
reclassification of any class or series of stock of the Corporation into shares
of Equivalent Securities and (B) the issuance of any security exchangeable for,
convertible into or evidencing the right to purchase any shares of Equivalent
Securities; or (ii) any other class or series of Preferred Stock, the terms of
which provide that such class or series shall rank senior to the Series A
Preferred Stock with respect to dividend rights or rights on liquidation,
winding up or dissolution ("Senior Securities"), including (A) the
reclassification of any class or series of stock of the Corporation into shares
of Senior Securities and (B) the issuance of any security exchangeable for,
convertible into or evidencing the right to purchase any shares of Senior
Securities.

                  6.       Redemption by the Corporation.

                           (a)      The Corporation may, at its option, on or
after the third anniversary of the first date on which shares of the Series A
Preferred Stock are issued, redeem all, but not less than all, shares of Series
A Preferred Stock, upon notice as set forth in Section 6(d) at hereof at the
redemption price set forth in Section 6(c) hereof any time if the average
Trading Price (as defined in Section 8(n)) of the Common Stock for the 30
consecutive Trading Days preceding the Redemption Notice Date (as defined in
Section 6(d)) shall exceed an amount equal to 200% of the Conversion Price (as
defined in Section 8(b)).

                           (b)      Upon the earlier of (i) Maturity or (ii)
the Corporation's redemption of its Series A 9.75% Convertible Senior
Pay-in-Kind Debentures due 2007 and its Series B 9.75% Convertible Senior
Pay-in-Kind Debentures due 2007 (collectively, the "Debentures"), the
Corporation shall redeem all outstanding shares of Series A Preferred Stock at
the redemption price set forth in Section 6(c) hereof.

                           (c)      The redemption price per share of the
Series A Preferred Stock shall be an amount in cash equal to the Stated Value
of such share of Series A Preferred Stock plus all accrued but unpaid dividends
thereon to the Redemption Date. The Corporation shall take all actions required
or permitted under the General Corporation Law of the State of Delaware (the
"DGCL") to permit such redemption of Series A Preferred Stock.

                           (d)      Notice of any redemption shall be sent by
or on behalf of the Corporation not less than 60 days prior to the date
specified for redemption in such notice (the "Redemption Date"), by first-class
mail, postage prepaid, to all



                                       5
<PAGE>   43

holders of record of Series A Preferred Stock at their last addresses as they
shall appear on the books of the Corporation (the date such notice is mailed by
or on behalf of the Corporation is referred to herein as the "Redemption Notice
Date"); provided, however, that no failure to give such notice or any defect
therein or in the mailing thereof shall affect the validity of the proceedings
for the redemption of any shares of Series A Preferred Stock except as to the
holder to whom the Corporation has failed to give notice or except as to the
holder to whom notice was defective. In addition to any information required by
law, such notice shall state: (i) whether such redemption is being made
pursuant to the optional redemption provisions hereof or the mandatory
redemption provisions hereof; (ii) the Redemption Date; (iii) the redemption
price; (iv) the place or places where certificates for such shares are to be
surrendered for payment of the redemption price; and (v) that dividends on the
shares to be redeemed will cease to accumulate as of the Redemption Date. Upon
the mailing of any such notice of redemption, the Corporation shall become
obligated to redeem at the time of redemption specified thereon all shares
called for redemption.

                           (e)      If notice has been mailed in accordance
with Section 6(d) hereof and provided that on or before the Redemption Date
specified in such notice, all funds necessary for such redemption shall have
been set aside by the Corporation, separate and apart from its other funds in
trust and for the pro rata benefit of the holders of the shares so called for
redemption, so as to be, and to continue to be available therefor, then, from
and after the Redemption Date, dividends on the shares of Series A Preferred
Stock so called for redemption shall cease to accumulate, and such shares shall
no longer be deemed to be outstanding and shall not have the status of shares
of Series A Preferred Stock, and all rights of the holders thereof as
stockholders of the Corporation (except the right to receive from the
Corporation the redemption price therefor) shall cease. Upon surrender, in
accordance with such notice, of the certificates for any shares so redeemed
(properly endorsed or assigned for transfer, if the Corporation shall so
require and the notice shall so state), such shares shall be redeemed by the
Corporation at the redemption price therefor.

                           (f)      Any deposit of funds with a bank or trust
company for the purpose of redeeming shares of Series A Preferred Stock shall
be irrevocable except that (i) any balance of monies so deposited by the
Corporation with respect to shares of Series A Preferred Stock converted by the
holder pursuant to Section 8 hereof prior to the Redemption Date shall be
repaid, together with interest or other earnings thereon, to the Corporation
within 30 days after the Redemption Date and (ii) any balance of monies so
deposited by the Corporation and unclaimed by the holders of shares of Series A
Preferred Stock entitled thereto at the expiration of two years from the
applicable Redemption Date shall be repaid, together with any interest or other
earnings earned thereon, to the Corporation, and after any such repayment, the
holders of the shares of Series A Preferred Stock entitled to the funds so
repaid to



                                       6
<PAGE>   44

the Corporation shall look only to the Corporation for payment without interest
or other earnings.

                           (g)      In connection with any redemption of Series
A Preferred Stock, holders of Series A Preferred Stock may exercise their right
to convert in accordance with Section 8 hereof by notifying the Corporation on
or before the Redemption Date.

                  7.       Voting Rights. In addition to any voting rights
provided elsewhere herein, and any voting rights provided by law, the holders
of shares of Series A Preferred Stock shall have the following voting rights:

                           (a)      For so long as any shares of Series A
Preferred Stock shall remain outstanding, each share of Series A Preferred
Stock shall entitle the holder thereof to vote on all matters voted on by
holders of the Common Stock, voting together as a single class with the Common
Stock and all other shares entitled to vote, if any, at all meetings of the
stockholders of the Corporation; provided, however, that the holders of shares
of Series A Preferred Stock shall not have the right to vote for any directors
of the Corporation (other than the right to elect the Preferred Directors in
accordance with Section 7(b) hereof.) With respect to any matter voted on by
holders of the Common Stock and the Series A Preferred Stock voting together as
a single class, each share of Series A Preferred Stock shall entitle the holder
thereof to cast the number of votes equal to the number of votes which could be
cast in such vote by a holder of the shares of Common Stock into which such
share of Series A Preferred Stock are convertible on the record date for such
vote or, if no such record date is established, on the date any written consent
of stockholders is solicited.

                           (b)      So long as shares of the Series A Preferred
Stock and the Debentures, having collectively, an aggregate Stated Value (with
respect to the Series A Preferred Stock) or principal amount (with respect to
the Debentures), equal to or greater than Fifty Million Dollars ($50,000,000)
remain outstanding, the Board of Directors shall consist of nine (9) members
and the holders of shares of Series A Preferred Stock shall have, in addition
to the other voting rights set forth herein, the exclusive right, voting
separately as a single class, to elect 4 directors of the Corporation (the
"Preferred Directors"), the remaining directors to be elected by the other
classes of stock entitled to vote therefor (excluding the Series A Preferred
Stock in accordance with Section 7(a) hereof), at each meeting of stockholders
held for the purpose of electing directors. So long as holders of the Series A
Preferred Stock have the right to elect the Preferred Directors, (i) holders of
in excess of 50% of the issued and outstanding shares of Series A Preferred
Stock may, by executing a consent in writing, remove any or all of the
Preferred Directors; and (ii) any vacancies created by the removal, resignation
or death of any Preferred Director may



                                       7
<PAGE>   45

be filled by a majority vote of the remaining Preferred Directors or by the
written consent of holders of more than 50% of the issued and outstanding
shares of Series A Preferred Stock.

                           (c)      Notwithstanding anything to the contrary
contained herein, any action required or permitted to be taken by the holders
of Series A Preferred Stock at any meeting of the holders of Series A Preferred
Stock may be taken without a meeting, without prior notice and without a vote,
if a consent in writing, setting forth the action so taken, shall be signed by
the holders of in excess of 50% of the issued and outstanding shares of Series
A Preferred Stock.

                  8.       Conversion Rights.

                           (a)      Each share of Series A Preferred Stock may
be converted at the option of the holder, at any time (except that, with
respect to any shares of Series A Preferred Stock which shall be called for
redemption, such right shall terminate as provided in Section 8(h) hereof) into
the number of fully paid, non-assessable shares of Common Stock obtained by
dividing the Stated Value by the Conversion Price (as defined in Section 8(b)
below) in effect on the date of conversion (the "Conversion Date"), in
accordance with and subject to the terms and conditions of this Section 8 and
the right to receive an additional number of fully paid and non-assessable
shares of Common Stock having a Share Value (as defined herein) equal to all
accrued and unpaid dividends on such share of Series A Preferred Stock (other
than previously declared dividends payable to a holder of record on a prior
Record Date which dividends shall be paid by the Corporation to such holder on
the next Dividend Payment Date) to the Conversion Date, whether or not
declared, such shares to be issued concurrently with the issuance of the shares
of Common Stock pursuant to Section 8(d) hereof. Subject to Section 6(g)
hereof, a holder of shares of Series A Preferred Stock shall have the right to
convert all or any portion of such shares pursuant to this Section 8 at any
time and from time to time.

                           (b)      The "Conversion Price" shall initially
equal $4.00, provided, however, that such Conversion Price shall be adjusted
and readjusted from time to time as provided in this Section 8 and, as so
adjusted and readjusted, shall remain in effect until a further adjustment or
readjustment thereof is required by this Section 8.

                           (c)      Upon surrender to the Corporation at the
office of the transfer agent or such other place or places, if any, as the
Board of Directors may determine, of certificates duly endorsed to the
Corporation or in blank for shares of Series A Preferred Stock to be converted
together with appropriate evidence of the payment of any transfer or similar
tax, if required, and written instructions to the Corporation requesting
conversion of such shares and specifying the name and



                                       8
<PAGE>   46

address of the person, corporation, firm or other entity to whom shares of
Common Stock are to be issued upon conversion thereof, the Corporation shall
issue the number of full shares of Common Stock rounded down to the nearest
whole number issuable upon conversion thereof as of the time of such surrender
and as promptly as practicable thereafter will deliver or cause to be delivered
certificates for such shares of Common Stock. In addition, the Corporation
shall, issue a number of shares of Common Stock having a Share Value equal to
all accrued and unpaid dividends on each share of Series A Preferred Stock so
surrendered for conversion (other than previously declared dividends payable to
a holder of record on a prior Record Date which dividends shall be paid by the
Corporation to such holder on the next Dividend Payment Date.) Upon surrender
of a certificate representing shares of Series A Preferred Stock to be
converted in part, in addition to the foregoing, the Corporation shall also
issue to such holder a new certificate representing any unconverted shares of
Series A Preferred Stock represented by the certificate surrendered for
conversion.

                           (d)      No fractional shares of Common Stock shall
be issued pursuant to this Section 8 and the number of shares of Common Stock
shall be rounded down to the nearest whole number of shares; provided, however,
that any such fractional shares to which a holder of Series A Preferred Stock
would otherwise be entitled shall be aggregated with any fractional shares
otherwise issuable in connection with any subsequent conversion by such holder
of shares of Series A Preferred Stock and each time such fractional share shall
equal one full share, such full share shall be issued to the holder entitled
thereto.

                           (e)      The Corporation shall pay all documentary,
stamp, or similar issue or transfer tax due upon conversion of Series A
Preferred Stock.

                           (f)      The Conversion Price shall be subject to
adjustment as follows:

                                    (i)      In case the Corporation shall (i)
pay or make a dividend or other distribution on the outstanding shares of
Common Stock in shares of Common Stock, (ii) subdivide or reclassify the
outstanding shares of Common Stock into a greater number of shares, or (iii)
combine or reclassify the outstanding shares of Common Stock into a smaller
number of shares, the Conversion Price in effect at the opening of business on
the day following the date fixed for the determination of stockholders entitled
to receive such dividend or other distribution or subject to such subdivision,
combination or reclassification shall be adjusted by multiplying such
Conversion Price by a fraction of which the numerator shall be the number of
shares of Common Stock outstanding at the close of business on the date fixed
for such determination and of which the denominator shall be the sum of such
number of shares outstanding immediately after the event described in clause
(i), (ii)



                                       9
<PAGE>   47

or (iii) of this Section 8(f), such adjustment to the Conversion Price to
become effective immediately after the opening of business on the day following
the date fixed for such determination.

                                    (ii)     In case the Corporation shall
issue rights, options or warrants to all holders of Common Stock entitling them
to subscribe for or purchase shares of Common Stock at a price per share less
than the Conversion Price in effect immediately prior to the date fixed for the
determination of stockholders entitled to receive such rights, options or
warrants (the "Pre-Determination Conversion Price"), the Conversion Price in
effect at the opening of business on the day following the date fixed for such
determination shall be reduced by multiplying the Pre-Determination Conversion
Price by a fraction of which the numerator shall be the number of shares of
Common Stock (as defined herein) outstanding at the close of business on the
date fixed for such determination plus the number of shares of Common Stock
which the aggregate offering price of the total number of shares of Common
Stock so offered for subscription would purchase at the Pre-Determination
Conversion Price, and of which the denominator shall be the number of shares of
Common Stock outstanding at the close of business on the date fixed for such
determination plus the number of shares of Common Stock so offered for
subscription or purchase, such reduction of the Conversion Price to become
effective immediately after the opening of business on the day following the
date fixed for such determination.

                                    (iii)    In case the Corporation shall, by
dividend or otherwise, distribute to all holders of Common Stock (i) shares of
capital stock of any class other than Common Stock, (ii) evidences of its
indebtedness or (iii) assets (excluding any rights, options or warrants
referred to in paragraph (ii) of this Section 8(f), any cash dividend or
distribution lawfully paid under the laws of the state of incorporation of the
Corporation, and any dividend or distribution referred to in paragraph (i) of
this Section 8(f)), the Conversion Price shall be adjusted so that the same
shall equal the price determined by multiplying the Conversion Price in effect
immediately prior to the close of business on the date fixed for the
determination of stockholders entitled to receive such distribution (the
"Pre-Determination Conversion Price") by a fraction of which the numerator
shall be the Pre-Determination Conversion Price less the fair market value (as
determined by the Board of Directors of the Corporation) of the portion of the
shares of capital stock or evidences of indebtedness or assets so distributed
applicable to one share of Common Stock, and of which the denominator shall be
the Pre-Determination Conversion Price, such adjustment to become effective
immediately prior to the opening of business on the day following the date
fixed for the determination of stockholders entitled to receive such
distribution.



                                      10
<PAGE>   48

                                    (iv)     In case the Corporation shall
issue any securities convertible into or exchangeable for Common Stock (other
than securities issued in transactions described in paragraph (ii) or (iii) of
this Section 8(f)), for a consideration per share of Common Stock less than the
Conversion Price immediately prior to the date of issuance of such securities
(the "Pre-Issuance Conversion Price"), the Conversion Price shall be adjusted
immediately thereafter so that it shall equal the price determined by
multiplying the Pre-Issuance Conversion Price by a fraction, of which the
numerator shall be the number of shares of Common Stock outstanding immediately
prior to the issuance of such securities plus the number of shares of Common
Stock which the aggregate consideration received for such securities would
purchase at the Pre-Issuance Conversion Price, and of which the denominator
shall be the number of shares of Common Stock outstanding immediately prior to
such issuance plus the maximum number of shares of Common Stock deliverable
upon conversion of or in exchange for such securities at the initial conversion
or exchange price or rate. Upon the termination of the right to convert or
exchange such securities, the Conversion Price shall forthwith be readjusted to
such Conversion Price as would have obtained had the adjustments made upon the
issuance of such convertible or exchangeable securities been made upon the
basis of the delivery of only the number of shares of Common Stock actually
delivered upon conversion or exchange of such securities and upon the basis of
the consideration actually received by the Corporation for such securities.

                                    (v)      In case of any reclassification of
the Common Stock (including any reclassification upon a consolidation or merger
in which the Corporation is the continuing or surviving corporation) into
securities other than Common Stock, the Series A Preferred Stock shall
thereafter be convertible into the kind and amount of shares of such securities
receivable upon such reclassification by a holder of the number of shares of
Common Stock into which the Series A Preferred Stock would be convertible
immediately prior to such reclassification.

                                    (vi)     In case the Corporation shall
issue shares of Common Stock for a consideration per share less than the
Conversion Price immediately prior to the date on which the Corporation fixes
the offering price of such additional shares (the "Pre-Offering Conversion
Price"), the Conversion Price shall be adjusted immediately thereafter so that
it shall equal the price determined by multiplying the Pre-Offering Conversion
Price by a fraction, of which the numerator shall be the total number of shares
of Common Stock outstanding immediately prior to the issuance of such
additional shares plus the number of shares of Common Stock which the aggregate
consideration received for the issuance of such additional shares would
purchase at the Pre-Offering Conversion Price, and of which the denominator
shall be the number of shares of Common Stock outstanding immediately after the
issuance of such additional shares. There shall be no adjustment, however,
pursuant to this paragraph (vi) with respect to any shares of Common Stock
issued (i) in any



                                      11
<PAGE>   49

of the transactions described in paragraph (ii) of this Section 8(f) where
there has been an adjustment in respect thereto; (ii) upon conversion or
exchange of securities convertible into or exchangeable for Common Stock where
there has been an adjustment; (iii) upon the exercise of any stock option
outstanding on the first date on which shares of Series A Preferred Stock are
issued (the "Original Issue Date"); (iv) upon the exercise of any stock option
granted by the Company (provided that, if applicable, any adjustment required
pursuant to paragraph (iii) of this Section 8(f) upon the grant of such option
has been made) or (v) upon the conversion of any convertible debenture of the
Company outstanding on the Original Issue Date or upon the conversion of any of
the Debentures.

                           (g)      Anything herein to the contrary
notwithstanding, no adjustment will be made to the Conversion Price by reason
of the issuance of Common Stock upon the conversion of Series A Preferred Stock
or by reason of the issuance of Series B Preferred Stock upon the conversion of
any of the Debentures. The Corporation shall not issue any shares of Series B
Preferred Stock except pursuant to the Certificate of Designations of the
Rights and Preferences of the Series B Preferred Stock or pursuant to the terms
of the Debentures (including the Indenture relating to the Debentures).

                           (h)      No adjustment in the Conversion Price need
be made unless the adjustment pursuant to Section 8(f) hereof would require an
increase or decrease of at least 1% in the Conversion Price; provided, however,
that any adjustments which by reason of this paragraph are not required to be
made shall be carried forward and taken into account in any subsequent
adjustment required to be made hereunder, and, in any event, shall be made no
later than the third anniversary of the date the adjustment pursuant to Section
8(f) hereof would have been made if it would have required an increase or
decrease of at least 1% in the Conversion Price. All adjustments to the
Conversion Price shall be made to the nearest one-one thousandth of a dollar.

                           (i)      No adjustment need be made for a change in
the par value of the Common Stock.

                           (j)      Whenever the Conversion Price is adjusted,
the Corporation shall promptly mail to holders of Series A Preferred Stock a
notice of adjustment briefly stating the facts requiring the adjustment and the
manner of computing such adjustment.

                           (k)      In case of any consolidation or merger of
the Corporation with any other entity, or in case of any sale or transfer of
all or substantially all of the assets of the Corporation, or in the case of
any share exchange pursuant to which all of the outstanding shares of Common
Stock are converted into



                                      12
<PAGE>   50

other securities or property, the Corporation shall make appropriate provision
or cause appropriate provision to be made so that the holder of each share of
Series A Preferred Stock then outstanding shall have the right thereafter to
convert such share of Series A Preferred Stock into the kind and amount of
shares of stock and other securities and property receivable upon such
consolidation, merger, sale, transfer or share exchange by a holder of the
number of shares of Common Stock into which such share of Series A Preferred
Stock might have been converted immediately prior to the effective date of such
consolidation, merger, sale, transfer or share exchange; provided, however,
that if a purchase, tender or exchange offer shall have been made to and
accepted by the holders of more than 50% of the outstanding shares of Common
Stock, and if a holder of shares of Series A Preferred Stock so designates in a
notice given to the Corporation on or before the date immediately preceding the
date of the consummation of such transaction, the holder of such Series A
Preferred Stock shall be entitled to receive the highest amount of securities,
cash or other property to which such holder would actually have been entitled
as a holder of Common Stock if the holder of Series A Preferred Stock had
converted shares of Series A Preferred Stock into Common Stock prior to the
expiration of such purchase, tender or exchange offer and accepted such offer,
subject to adjustments (from and after the consummation of such purchase,
tender or exchange offer) as nearly equivalent as possible to the adjustments
provided for in this Section 8. If in connection with any such consolidation,
merger, sale, transfer or share exchange, each holder of shares of Common Stock
is entitled to elect to receive either securities, cash or other assets upon
completion of such transaction, the Corporation shall provide or cause to be
provided to each holder of Series A Preferred Stock the right to elect to
receive the securities, cash or other assets into which Series A Preferred
Stock held by such holder shall be convertible after completion of any such
transaction on the same terms and subject to the same conditions applicable to
holders of the Common Stock (including, without limitation, notice of the right
to elect, limitations on the period in which such election shall be made and
the effect of failing to exercise the election). The Corporation shall not
effect any such transaction unless the provisions of this paragraph have been
fulfilled. The above provisions shall similarly apply to successive
consolidations, mergers, sales, transfers or share exchanges.

                           (l)      In case any other stock (other than Common
Stock but including, without limitation, any class or series of Preferred
Stock) or other securities of any other entity (corporate or otherwise) or the
Corporation ("Other Securities") shall be issued or sold or shall become
subject to issue or sale upon the conversion or exchange of any stock (or Other
Securities) of the Corporation or to subscription, purchase or other
acquisition for a consideration such as to dilute, on a basis consistent with
the standards established in the other provisions of this Section 8, the
conversion rights of the Series A Preferred Stock, then, and in each such case,
the computations, adjustments and readjustments provided for in this Section 8
with



                                      13
<PAGE>   51

respect to the Conversion Price shall be made as nearly as possible in the
manner so provided and applied to determine the amount of Other Securities from
time to time receivable upon the conversion of shares of Series A Preferred
Stock, so as to protect the holders of Series A Preferred Stock against the
effect of such dilution.

                           (m)      The Corporation shall reserve and at all
times keep available, free from preemptive rights, out of its authorized but
unissued stock, for the purpose of effecting the conversion of Series A
Preferred Stock, such number of its duly authorized Common Stock as shall from
time to time be sufficient to effect the conversion of all outstanding shares
of Series A Preferred Stock. The Corporation covenants that all shares of
Common Stock issued upon conversion of outstanding shares of Series A Preferred
Stock shall, upon issuance, be duly authorized, validly issued, fully paid and
non-assessable and free and clear of all liens and charges.

                           (n)      For purposes hereof, the following terms
have the following meanings:

                                    (i)      "Trading Price" on any Trading Day
with respect to the per share price of any shares of Common Stock means the
average of the reported high and low sale price or, in case no such reported
sale takes place on such day, the average of the reported high and low bid and
asked prices, in either case, on the American Stock Exchange or, if shares of
Common Stock are not listed or admitted to trading on such exchange, on the
principal national securities exchange on which such shares are listed or
admitted to trading or, if not listed or admitted to trading on any national
securities exchange, on the NASDAQ or, if such shares are not listed or
admitted to trading on any national securities exchange or quoted on NASDAQ,
the average of the high and low bid and asked prices in the over-the-counter
market as furnished by any American Stock Exchange member firm that is selected
from time to time by the Corporation for that purpose.

                                    (ii)     "Maturity" means the seventh
anniversary of the Original Issue Date of the Series A Preferred Stock.

                                    (iii)    "Share Value" means the average
Trading Price of the Common Stock for the five consecutive Trading Days
immediately preceding the Conversion Date; provided, however, that in the event
that the Trading Price of the Common Stock cannot be determined pursuant to
subsection n(i) hereof, the "Share Value" shall mean the fair market value of a
share of Common Stock on the Conversion Date as agreed to by the Corporation,
on the one hand, and a majority of the holders of the Series A Preferred Stock
requesting conversion (voting or consenting in writing as a separate class), on
the other hand; provided, further, that if such holders and the Corporation
cannot agree on the Trading Price within 10 days,



                                      14
<PAGE>   52

the Trading Price shall be determined by an independent nationally-recognized
investment banking firm mutually acceptable to the Company, on the one hand,
and a majority of such holders (voting or consenting in writing as a separate
class), on the other hand, or if the Corporation and such holders are unable to
so agree within 5 days, by an independent nationally recognized investment
banking firm selected by the American Arbitration Association.

                                    (iv)     "Trading Day," with respect to a
securities exchange or automated quotation system, means a day on which such
exchange or system is open for a full day of trading.

                  9.       Shares to Be Retired. Any share of Series A
Preferred Stock converted, redeemed, repurchased or otherwise acquired by the
Corporation shall be retired and cancelled and shall upon cancellation be
restored to the status of authorized but unissued shares of preferred stock,
subject to reissuance by the Board of Directors as Series A Preferred Stock or
shares of Preferred Stock of one or more other series.

                  10.      Record Holders. The Corporation and the
Corporation's transfer agent may deem and treat the record holder of any shares
of Series A Preferred Stock as the true and lawful owner thereof for all
purposes, and neither the Corporation nor the Corporation's transfer agent
shall be affected by any notice to the contrary.

                  11.      Notice. Except as may otherwise be provided for
herein, all notices referred to herein shall be in writing, and all notices
hereunder shall be deemed to have been given upon, the earlier of receipt of
such notice or three Business Days after the mailing of such notice if sent by
registered mail (unless first-class mail shall be specifically permitted for
such notice under the terms of this Certificate of Designations) with postage
prepaid, addressed, if to the Corporation, to its offices at 10000 Innovation
Drive, Milwaukee, Wisconsin 53005, (Attention: Chief Financial Officer) or to
an agent of the Corporation designated as permitted by the Certificate of
Incorporation or, if to any holder of Series A Preferred Stock, to such holder
at the address of such holder of Series A Preferred Stock as listed in the
stock record books of the Corporation (which may include the records of the
Corporation's transfer agent); or to such other address as the Corporation or
holder, as the case may be, shall have designated by notice similarly given.



                                      15
<PAGE>   53
                                                                     EXHIBIT A-2





                          CERTIFICATE OF DESIGNATIONS,
                             RIGHTS AND PREFERENCES

                                     OF THE

                                    SERIES B

                            NON-VOTING PARTICIPATING

                                PREFERRED STOCK

                                       OF

                         ALTERRA HEALTHCARE CORPORATION



                  1.       Designation. The Preferred Stock of Alterra
Healthcare Corporation (the "Company"), created and authorized for issuance
hereby shall be designated as "Series B Non-Voting Participating Preferred
Stock" (hereinafter "Series B Preferred Stock") which will consist of
___________ shares of such Series B Preferred Stock, each of which has a stated
value of $400 per share as adjusted, from time to time, in accordance with the
provisions of Section 8 hereof (the "Stated Value"). The Company shall not
issue any shares of Series B Preferred Stock except pursuant to Section 8 of
this Certificate of Designations, Rights and Preferences or the terms of the
Company's Series A 9.75% Senior Convertible Pay-in-Kind Debentures or the
Company's Series B 9.75% Senior Convertible Pay-in-Kind Debentures
(collectively, the "Debentures") or the Indenture relating to such Debentures.

                  2.       Priority. The Series B Preferred Stock shall, with
respect to dividend rights and rights on liquidation, winding up or
dissolution, whether voluntary or involuntary, whether now or hereafter issued,
rank (i) junior to the Company's Series A 9.75% Cumulative Convertible
Pay-in-Kind Preferred Stock (the "Series A Preferred Stock"), any other series
of Preferred Stock established by the Company's Board of Directors (the "Board
of Directors"), the terms of which shall specifically provide that such series
shall rank senior to the Series B Preferred Stock with respect to dividend
rights and rights on liquidation, winding up or dissolution (all of such series
of Preferred Stock to which the Series B Preferred Stock ranks junior, are at
times collectively referred to herein as the "Senior Securities"), and (ii)
senior to the Company's Common Stock, $.01 par value per share (the "Common
Stock"), (except that with respect to dividends the Series B Preferred Stock
shall rank pari pasu with the Common Stock) and the Company's Series A Junior
Participating Preferred Stock (the "Junior Preferred
<PAGE>   54

Stock"), and, subject to clause (i) of this Section 2, any other equity
securities of the Company, with respect to dividend rights and rights on
liquidation, winding up or dissolution (all of such equity securities of the
Company to which the Series B Preferred Stock ranks senior, including the
Common Stock, are at times collectively referred to herein as the "Junior
Securities").

                  3.       Dividends.

                           (a)      Each Holder of a share of Series B
Preferred Stock shall be entitled to receive, when, as and if declared by the
Board of Directors out of funds legally available therefor under the General
Corporation Law of the State of Delaware (the "DGCL"), dividends for each share
of Series B Preferred Stock in an amount equal the amount of all cash
dividends, all non cash dividends and all other distributions (other than a
dividend payable in shares of Common Stock or a subdivision of the outstanding
shares of Common Stock by reclassification or otherwise, each of which are
addressed in Section 8 hereof) declared and paid on the Common Stock, as if the
shares of Series B Preferred Stock had been converted immediately prior to the
record date for payment of such dividends or distributions at the conversion
rate set forth in Section 5 hereof. Dividends on shares of Series B Preferred
Stock shall be payable in cash or in such other property, securities or assets
(other than shares of Common Stock) as may be declared and paid by the Company
as a dividend to the holders of the Company's issued and outstanding shares of
Common Stock. Dividends shall be paid to the holders of record of shares of
Series B Preferred Stock at the close of business on the date specified by the
Board of Directors of the Company at the time such dividend is declared;
provided, however, that such record date shall not be more than 60 days nor
less than 10 days prior to the respective dividend payment date.

                           (b)      All dividends paid with respect to shares
of Series B Preferred Stock pursuant to Section 3(a) hereof shall be paid pro
rata to the holders entitled thereto.

                           (c)      If at any time the Company shall have
failed to pay all dividends which have accrued on any outstanding shares of
Senior Securities at the times such dividends are payable, unless otherwise
provided in the terms of such Senior Securities, no cash or stock dividend
(except in shares of Series B Preferred Stock) shall be declared by the Board
of Directors or paid or set apart for payment by the Company on shares of
Series B Preferred Stock unless prior to or concurrently with such declaration,
payment or setting apart for payment, all accrued and unpaid dividends on all
outstanding shares of such Senior Securities shall have been declared, paid or
set apart for payment, without interest.

                  4.       Liquidation Preference.

                           (a)      In the event of any voluntary or
involuntary liquidation, dissolution or winding up of the affairs of the
Company, the holders of shares of Series B Preferred Stock then outstanding
shall be entitled to be paid out of the assets of the Company available for
distribution to its stockholders an amount in cash equal to the greater of (i)
the Stated Value and (ii) the Common Stock Liquidation Amount (as defined
below) for each share of Series B Preferred Stock outstanding plus all declared
but unpaid dividends thereon to the date fixed for liquidation, before any
payment shall be made or any assets distributed to the holders of any of the
Junior Securities (the "Liquidation Preference"); provided, however, that the
holders of outstanding shares of Series B Preferred Stock shall not be entitled
to receive such liquidation



                                       2
<PAGE>   55

payment until the liquidation payments on all outstanding shares of Senior
Securities shall have been paid in full. If the assets of the Company are not
sufficient to pay in full the liquidation payments payable to the holders of
outstanding shares of Series B Preferred Stock, then the holders of all such
shares shall share ratably in such distribution of assets in accordance with
the full respective preferential amounts that would be payable on such shares
of Series B Preferred Stock if all amounts payable thereon were paid in full.

                           (b)      For the purposes of this Section 4,
"Common Stock Liquidation Amount" means the amount, if any, that each
outstanding share of Series B Preferred Stock would be entitled to receive
following the payment by the Company of any liquidation preferences with
respect to the Senior Securities, out of assets legally available for
distribution as contemplated by the relevant provisions of the DGCL and
applicable law, assuming that the holders of shares of Series B Preferred Stock
were entitled to participate with the holders of Common Stock in all other
assets of the Company (with each share of Series B Preferred Stock entitled to
participate on the same basis as one hundred (100) shares of Common Stock).

                           (c)      For the purposes of this Section 4, (i) the
voluntary sale, conveyance, exchange or transfer (for cash, shares of stock,
securities or other consideration) of all or substantially all of the property
or assets of the Company (unless and until such sale, conveyance, exchange or
transfer is followed by the dissolution of the Company pursuant to the DGCL) or
(ii) the consolidation or merger of the Company with one or more other
companies or entities shall not be deemed to be a liquidation, dissolution or
winding up, voluntary or involuntary.

                  5.       Conversion by the Company.

                           (a)      The Company may, at its option, on or after
______________, 2003 [third anniversary of the Closing], convert all, but not
less than all, of the shares of Series B Preferred Stock then outstanding, upon
notice as set forth in Section 5(d) hereof, into shares of Common Stock with
each share of Series B Preferred Stock being converted into one hundred (100)
shares of fully paid non-assessable shares of Common Stock in accordance with
and subject to the terms of this Section 5.

                           (b)      Notice of any conversion shall be sent by
or on behalf of the Company not less than 30 days prior to the date specified
for such conversion in such notice (the "Conversion Date"), by first-class
mail, postage prepaid, to all holders of record of Series B Preferred Stock at
their last addresses as they shall appear on the books of the Company (the date
such notice is mailed by or on behalf of the Company is referred to herein as
the "Conversion Notice Date"); provided, however, that no failure to give such
notice or any defect therein or in the mailing thereof shall affect the
validity of the proceedings for the conversion of any shares of Series B
Preferred Stock except as to the holder to whom the Company has failed to give
notice or except as to the holder to whom such notice was defective. In
addition to any information required by law, such notice shall state: (i) the
place or places where certificates for such shares are to be surrendered; and
(ii) that dividends on the shares to be converted will cease to accumulate as
of the Conversion Date.



                                       3
<PAGE>   56

                           (c)      If notice has been mailed in accordance
with Section 5(b) hereof and, provided that on or before the Conversion Date
specified in such notice, all shares of Common Stock necessary for such
conversion shall have been set aside by the Company for the pro rata benefit of
the holders of the Series B Preferred Stock so called for conversion, so as to
be, and to continue to be available therefor, then, from and after the
Conversion Date, dividends on the shares of Series B Preferred Stock so called
for conversion shall cease to accumulate, and such shares shall no longer be
deemed to be outstanding and shall not have the status of shares of Series B
Preferred Stock, and all rights of the holders thereof as stockholders of the
Company (except the right to receive from the Company shares of Common Stock in
connection with the conversion) shall cease.

                           (d)      Upon surrender to the Company at the office
of the transfer agent or such other place or places, if any, as the Board of
Directors may determine and as specified in the Conversion Notice, of
certificates duly endorsed to the Company or in blank for shares of Series B
Preferred Stock called for conversion together with appropriate evidence of the
payment of any transfer or similar tax, if required, the Company shall issue
the number of shares of Common Stock issuable upon conversion thereof as of the
time of such surrender and as promptly as practicable thereafter will deliver
or cause to be delivered certificates for such shares of Common Stock to the
record holder of the shares so surrendered.

                           (e)      No fractional shares of Common Stock shall
be issued pursuant to this Section 5 and the aggregate number of shares of
Common Stock issued to a holder of Series B Preferred Stock shall be rounded
down to the nearest whole number of shares.

                           (f)      The Company shall pay all documentary,
stamp, or similar issue or transfer tax due upon conversion of Series B
Preferred Stock.

                  6.       Redemption at the Request of the Holder.

                           (a)      Any holder of Series B Preferred Stock may,
at its option, on or after ________________, 2003 [the third anniversary of the
Closing], from time to time, cause the Company to redeem all, but not less than
all, of the Series B Preferred Stock held by such holder on such date, upon
notice as set forth in Section 6(c) hereof at the redemption price set forth in
Section 6(b) hereof.

                           (b)      The Redemption Price of each share of the
Series B Preferred Stock shall be an amount in cash equal to one hundred (100)
times the Common Share Value (hereinafter defined) on the Redemption Date (as
defined herein) and, at the election of the Company, may be paid in cash or may
be satisfied in full by issuing to the holder one hundred (100) shares of
Common Stock for each share of Series B Preferred Stock that is subject to
redemption. The Company shall take all actions required or permitted under the
DGCL to permit such redemption of Series B Preferred Stock.

                           (c)      Notice of any requested redemption pursuant
to Section 6(a) hereof shall be sent by or on behalf of the holder of shares of
Series B Preferred Stock by first-class mail, postage prepaid, to the Company
at its address set forth in Section 11 hereof (the date of such mailing being
referred to herein as the Redemption Date). Such notice shall state: (i) that



                                       4
<PAGE>   57

such redemption is being requested pursuant the redemption provisions hereof;
and (ii) the number of shares of Series B Preferred Stock to be redeemed. Upon
receipt by the Company of any such notice of requested redemption, the Company
shall become obligated to redeem as soon as practicable thereafter all shares
as to which redemption has been requested.

                           (d)      For purposes hereof, the following terms
have the following meanings:

                                    (i)      "Closing Price" on any Trading Day
                  with respect to the per share price of any shares of Common
                  Stock means the last reported sale price regular way or, in
                  case no such reported sale takes place on such day, the
                  average of the reported closing bid and asked prices regular
                  way, in either case on the American Stock Exchange or, if
                  shares of Common Stock are not listed or admitted to trading
                  on such exchange, on the principal national securities
                  exchange on which such shares are listed or admitted to
                  trading or, if not listed or admitted to trading on any
                  national securities exchange, on the NASDAQ or, if such
                  shares are not listed or admitted to trading on any national
                  securities exchange or quoted on NASDAQ, the average of the
                  closing bid and asked prices in the over-the-counter market
                  as furnished by any American Stock Exchange member firm that
                  is selected from time to time by the Company for that
                  purpose.

                                    (ii)     "Common Share Value" means the
                  average of the Closing Price of the Common Stock for the five
                  (5) consecutive Trading Days immediately preceding the
                  Redemption Date; provided, however, that in the event that the
                  Closing Price of Common Stock cannot be determined pursuant to
                  subsection d(i) hereof, the "Common Share Value" shall mean
                  the fair market value of a share of Common Stock on the
                  Redemption Date as agreed to by the Company, on the one hand,
                  and the holders of a majority of the shares of Series B
                  Preferred Stock that are subject to redemption (voting or
                  consenting in writing as a separate class), on the other hand;
                  provided, further, that if the Company and such holders are
                  unable to so agree within 10 days after the Redemption Date,
                  the fair market value of a share of Common Stock shall be
                  determined by an independent nationally-recognized investment
                  banking firm mutually acceptable to the Company, on the one
                  hand, and the holders of a majority of the shares of Series B
                  Preferred Stock that are subject to redemption (voting or
                  consenting in writing as a separate class), on the other hand,
                  or if the Company and such holders are unable to so agree
                  within 5 days, by an independent nationally-recognized
                  investment banking firm selected by the American Arbitration
                  Association.

                                    (iii)    "Trading Day," with respect to a
                  securities exchange or automated quotation system, means a
                  day on which such exchange or system is open for a full day
                  of trading.

                  7.       Voting Rights. Except as otherwise provided herein
or as otherwise required by law, holders of the Series B Preferred Stock shall
have no voting rights; provided, however, that, notwithstanding the foregoing,
the holders of the Series B Preferred Stock, acting by vote of a majority of
the then outstanding Series B Preferred Stock, shall be entitled to



                                       5
<PAGE>   58
approve, voting together as a single class: (i) any amendment or modification,
direct or indirect, of the rights or preferences of the Common Stock or the
Series B Preferred Stock, whether by amendment of the Certificate of
Incorporation, recapitalization, merger or otherwise (including, without
limitation, the authorization or the filing of any certificate of designations
with respect to any additional class or series of capital stock of the Company)
and (ii) any merger, amendment of the Certificate of Incorporation, share
exchange or other corporate action (including, without limitation, any offer by
the Company to repurchase shares of Common Stock or any amendment to the Rights
Agreement between the Company and American Stock Transfer & Trust Company dated
as of December 10, 1998 involving the conversion or exchange of Common Stock or
the receipt of cash, securities (whether of the Company or any other entity),
options, warrants or rights to acquire securities or other property by holders
of Common Stock (except to the extent such transaction is subject to the
provisions of Section 8 hereof) unless the holders of Series B Preferred Stock
are entitled to participate in such transaction on the same terms as the holders
of Common Stock (with each share of Series B Preferred Stock entitled to
participate on the same basis as one hundred (100) shares of Common Stock). Each
share of Series B Preferred Stock shall entitle the holder thereof to cast one
vote on any matter submitted to a vote of the holders of the Series B Preferred
Stock in accordance with the preceding sentence. Notwithstanding anything to the
contrary contained herein, any action required or permitted to be taken by the
holders of Series B Preferred Stock at any meeting of the holders of Series B
Preferred Stock may be taken without a meeting, without prior notice and without
a vote, if a consent in writing, setting forth the action so taken, shall be
signed by the holders of more than 50% of the issued and outstanding shares of
Series B Preferred Stock.

                  8.       Anti-Dilution Adjustments.

                           (a)      In case the Company shall (i) pay or make a
dividend or other distribution on the outstanding shares of Common Stock in
shares of Common Stock, (ii) subdivide or reclassify the outstanding shares of
Common Stock into a greater number of shares, or (iii) combine or reclassify
the outstanding shares of Common Stock into a smaller number of shares, the
number of issued and outstanding shares of Series B Preferred Stock (the
"Outstanding Number") at the opening of business on the day following the date
fixed for the determination of stockholders entitled to receive such dividend
or other distribution or subject to such subdivision, combination or
reclassification (the "Record Date") shall be adjusted by multiplying such
Outstanding Number by a fraction of which the numerator shall be the sum of
such number of shares of Common Stock outstanding immediately after the event
described in clauses (i), (ii) or (iii) of this Section 8(a) and of which the
denominator shall be the number of shares of Common Stock outstanding at the
close of business on the Record Date, such adjustment to the Outstanding Number
to become effective immediately after the opening of business on the Record
Date. No adjustment to the Outstanding Number need be made for a change in the
par value of the Common Stock. Whenever the Outstanding Number is adjusted, the
Stated Value of each share of Series B Preferred Stock shall be adjusted
proportionately such that the aggregate Stated Value of all issued and
outstanding shares of Series B Preferred Stock shall not change as the result
of the adjustment of the Outstanding Number.



                                       6
<PAGE>   59

                           (b)      Whenever the Outstanding Number is
adjusted, the Company shall promptly mail to the holders of Series B Preferred
Stock (i) a notice of adjustment briefly stating the facts requiring the
adjustment, the manner of computing such adjustment and any adjustment to the
Stated Value; and (ii) a certificate or certificates representing the number of
whole shares of Series B Preferred Stock to which such holder is entitled
pursuant to Section 8(a) hereof or, in the case of a reduction in the
Outstanding Number, a new certificate or certificates, in exchange for such
holder's existing certificate or certificates, representing the number of whole
shares of Series B Preferred Stock to which such holder is entitled following
the adjustment provided for in Section 8(a) hereof. No fractional shares of
Series B Preferred Stock shall be issued by the Company, so that the number of
shares of Series B Preferred Stock to be issued pursuant to this Section 8 to a
holder of Series B Preferred Stock shall be rounded down to the nearest whole
number of shares and the Company shall make a cash payment to a holder of
shares of Series B Preferred Stock who would otherwise have received a
fractional share of Series B Preferred Stock in an amount equal to the greater
of (i) the portion of the Stated Value represented by such fraction or (ii) the
portion of the Common Stock Liquidation Amount represented by such fraction
determined as of the Record Date of the action necessitating the adjustment;
provided, however, that, at the option of the Company, the number of shares of
Series B Preferred Stock to be issued to each holder of Series B Preferred
Stock may be rounded up to the nearest whole number in lieu of making a cash
payment with respect to any fractional amount.

                           (c)      In case of any consolidation or merger of
the Company with any other entity, or in case of any sale or transfer of all or
substantially all of the assets of the Company, or in the case of any share
exchange pursuant to which all of the outstanding shares of Common Stock are
converted into other securities or property, the Company shall make appropriate
provision or cause appropriate provision to be made so that the holder of each
share of Series B Preferred Stock then outstanding shall have the right
thereafter to receive, in exchange for holder's shares of Series B Preferred
Stock, the kind and amount of shares of stock and other securities and property
receivable upon such consolidation, merger, sale, transfer or share exchange by
a holder of one hundred (100) shares of Common Stock; provided, however, that
if a purchase, tender or exchange offer shall have been made to and accepted by
the holders of more than 50% of the outstanding shares of Common Stock, and if
a holder of shares of Series B Preferred Stock so designates in a notice given
to the Company on or before the date immediately preceding the date of the
consummation of such transaction, the holder of such Series B Preferred Stock
shall be entitled to receive the highest amount of securities, cash or other
property to which a holder of a number of shares of Common Stock equal to one
hundred (100) times the number of shares of Series B Preferred Stock held by
such holder of Series B Preferred Stock would actually have been entitled to
receive upon the consummation of such purchase, tender or exchange offer,
subject to adjustments (from and after the consummation of such purchase,
tender or exchange offer) as nearly equivalent as possible to the adjustments
provided for in this Section 8. If in connection with any such consolidation,
merger, sale, transfer or share exchange, each holder of shares of Common Stock
is entitled to elect to receive either securities, cash or other assets upon
completion of such transaction, the Company shall provide or cause to be
provided to each holder of Series B Preferred Stock the right to elect to
receive the securities, cash or other assets a holder of a number of shares of
Common Stock equal to one hundred (100) times the number of shares of Series B
Preferred Stock held by such holder of Series B Preferred Stock would have been
entitled to elect to receive on the same terms and subject to the same
conditions applicable to holders of the Common Stock (including, without
limitation, notice of



                                       7
<PAGE>   60

the right to elect, limitations on the period in which such election shall be
made and the effect of failing to exercise the election). The Company shall not
effect any such transaction unless the provisions of this paragraph have been
fulfilled. The above provisions shall similarly apply to successive
consolidations, mergers, sales, transfers or share exchanges.

                           (d)      Anything herein to the contrary
notwithstanding, no adjustment will be made pursuant to Section 8 hereof by
reason of the issuance of Common Stock upon the conversion of Series A
Preferred Stock or Debentures or by reason of the issuance of Series B
Preferred Stock upon the conversion of the Debentures.

                  9.       Shares to Be Retired. Any share of Series B
Preferred Stock redeemed, repurchased or otherwise acquired by the Company
shall be retired and cancelled and shall upon cancellation be restored to the
status of authorized but unissued shares of Preferred Stock, subject to
reissuance by the Board of Directors as Series B Preferred Stock or shares of
preferred stock of one or more other series.

                  10.      Record Holders. The Company and the Company's
transfer agent may deem and treat the record holder of any shares of Series B
Preferred Stock as the true and lawful owner thereof for all purposes, and
neither the Company nor the Company's transfer agent shall be affected by any
notice to the contrary.

                  11.      Notice. Except as may otherwise be provided for
herein, all notices referred to herein shall be in writing, and all notices
hereunder shall be deemed to have been given upon, the earlier of receipt of
such notice or three Business Days after the mailing of such notice if sent by
registered mail (unless first-class mail shall be specifically permitted for
such notice under the terms of this Certificate of Designations) with postage
prepaid, addressed, if to the Company, to its offices at 10000 Innovation
Drive, Milwaukee, Wisconsin 53005, (Attention: Chief Financial Officer) or to
an agent of the Company designated as permitted by the Certificate of
Incorporation or, if to any holder of Series B Preferred Stock, to such holder
at the address of such holder of Series B Preferred Stock as listed in the
stock record books of the Company (which may include the records of the
Company's transfer agent); or to such other address as the Company or holder,
as the case may be, shall have designated by notice similarly given.



                                       8
<PAGE>   61
                                   EXHIBIT B

===============================================================================




                         ALTERRA HEALTHCARE CORPORATION


                                   $---------


       SERIES A 9.75% CONVERTIBLE SENIOR PAY-IN-KIND DEBENTURES DUE 2007


       SERIES B 9.75% CONVERTIBLE SENIOR PAY-IN-KIND DEBENTURES DUE 2007


                                ----------------


                                   INDENTURE


                         DATED AS OF ___________, 2000




                                   [TRUSTEE]




                                ----------------




                                    TRUSTEE




===============================================================================


<PAGE>   62


                               TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                                                               PAGE

         <S>                   <C>                                                                             <C>
         ARTICLE I             DEFINITIONS........................................................................1
         Section 1.1           Definitions........................................................................1
         Section 1.2.          Rules of Construction..............................................................5

         ARTICLE II            THE NOTES..........................................................................5
         Section 2.1.          Designation, Amount and Issue of Notes.............................................5
         Section 2.2.          Form of Notes......................................................................6
         Section 2.3.          Date and Denomination of Notes; Payments of Interest...............................6
         Section 2.4.          Execution of Notes.................................................................8
         Section 2.5.          Paying Agent to Hold Money in Trust................................................9
         Section 2.6.          Noteholder Lists...................................................................9
         Section 2.7.          Exchange and Registration of Transfer of Notes; Restrictions on Transfer;
                               Depositary........................................................................10
         Section 2.8.          Mutilated, Destroyed, Lost or Stolen Notes........................................14
         Section 2.9.          Treasury Notes....................................................................15
         Section 2.10.         Temporary Notes...................................................................15
         Section 2.11.         Cancellation......................................................................16
         Section 2.12.         Deposit of Funds..................................................................16

         ARTICLE III           REDEMPTION OF NOTES...............................................................16
         Section 3.1.          Right to Redeem; Notice to Trustee................................................16
         Section 3.2.          Effect of Notice of Redemption....................................................17
         Section 3.3.          Deposit of Redemption Price.......................................................17
         Section 3.4.          Conversion Arrangement on Call for Redemption.....................................18

         ARTICLE IV            RANKING...........................................................................18

         ARTICLE V             COVENANTS.........................................................................18
         Section 5.1.          Payment of Notes..................................................................18
         Section 5.2.          SEC Reports.......................................................................19
         Section 5.3.          Maintenance of Office or Agency...................................................19
         Section 5.4.          Stay, Extension and Usury Laws....................................................20
         Section 5.5.          Liquidation.......................................................................20
         Section 5.6.          Compliance Certificates...........................................................21
         Section 5.7.          Corporate Existence...............................................................21
         Section 5.8.          Further Instruments and Acts......................................................21
         Section 5.9.          Certain Restrictions..............................................................21

         ARTICLE VI            NOTEHOLDERS' LISTS AND REPORTS BY THE TRUSTEE.....................................23
         Section 6.1.          Holders' Lists....................................................................23
         Section 6.2.          Preservation and Disclosure of Lists..............................................23
         Section 6.3.          Reports by Trustee................................................................23
</TABLE>


<PAGE>   63


<TABLE>
         <S>                   <C>                                                                               <C>
         ARTICLE VII           REMEDIES OF THE TRUSTEE AND NOTEHOLDERS ON AN EVENT OF DEFAULT....................24
         Section 7.1.          Events of Default.................................................................24
         Section 7.2.          Payment of Notes on Default; Suit Therefor........................................26
         Section 7.3.          Application of Monies Collected by Trustee........................................27
         Section 7.4.          Proceedings by Holders............................................................28
         Section 7.5.          Proceedings by Trustee............................................................28
         Section 7.6.          Remedies Cumulative and Continuing................................................29
         Section 7.7.          Direction of Proceedings and Waiver of Defaults by Majority of Holders............29
         Section 7.8.          Notice of Defaults................................................................30
         Section 7.9.          Undertaking to Pay Costs..........................................................30

         ARTICLE VIII          CONCERNING THE TRUSTEE............................................................30
         Section 8.1.          Duties and Responsibilities of Trustee............................................30
         Section 8.2.          Reliance on Documents, Opinions, Etc..............................................31
         Section 8.3.          No Responsibility for Recitals, Etc...............................................32
         Section 8.4.          Trustee, Paying Agents, Conversion Agents or Registrar May Own Notes..............33
         Section 8.5.          Monies to Be Held in Trust........................................................33
         Section 8.6.          Compensation and Expenses of Trustee..............................................33
         Section 8.7.          Officers' Certificate as Evidence.................................................34
         Section 8.8.          Conflicting Interests of Trustee..................................................34
         Section 8.9.          Eligibility of Trustee............................................................34
         Section 8.10.         Resignation or Removal of Trustee.................................................34
         Section 8.11.         Acceptance by Successor Trustee...................................................36
         Section 8.12.         Succession by Merger, Etc.........................................................36
         Section 8.13.         Limitation on Rights of Trustee as Creditor.......................................37

         ARTICLE IX            CONCERNING THE NOTEHOLDERS........................................................37
         Section 9.1.          Action by Holders.................................................................37
         Section 9.2.          Proof of Execution by Holders.....................................................37
         Section 9.3.          Who are Deemed Absolute Owners....................................................37
         Section 9.4.          Company-Owned Notes Disregarded...................................................38
         Section 9.5.          Revocation of Consents; Future Holders Bound......................................38

         ARTICLE X             NOTEHOLDERS' MEETINGS.............................................................39
         Section 10.1.         Purpose of Meetings...............................................................39
         Section 10.3.         Call of Meetings by Company or Holders............................................39
         Section 10.4.         Qualifications for Voting.........................................................40
         Section 10.5.         Regulations.......................................................................40
         Section 10.6.         Voting............................................................................40
         Section 10.7.         No Delay of Rights by Meeting.....................................................41

         ARTICLE XI            SUPPLEMENTAL INDENTURES...........................................................41
         Section 11.1.         Supplemental Indentures Without Consent of Holders................................41
         Section 11.2.         Supplemental Indentures With Consent of Holders...................................42
</TABLE>


                                      ii
<PAGE>   64


<TABLE>
         <S>                   <C>                                                                               <C>
         Section 11.3.         Effect of Supplemental Indenture..................................................43
         Section 11.4.         Notation on Notes.................................................................43

         Section 11.5.         Evidence of Compliance of Supplemental Indenture to Be Furnished Trustee..........44

         ARTICLE XII           CONSOLIDATION, MERGER, SALE, CONVEYANCE AND LEASE.................................44
         Section 12.1.         Company May Consolidate Etc. on Certain Terms.....................................44
         Section 12.2.         Successor Corporation to Be Substituted...........................................44
         Section 12.3.         Opinion of Counsel to Be Given Trustee............................................45

         ARTICLE XIII          SATISFACTION AND DISCHARGE OF INDENTURE...........................................45
         Section 13.1.         Discharge of Indenture............................................................45
         Section 13.2.         Deposited Monies to Be Held in Trust by Trustee...................................45
         Section 13.3.         Paying Agent to Repay Monies Held.................................................46
         Section 13.4.         Return of Unclaimed Monies........................................................46
         Section 13.5.         Reinstatement.....................................................................47

         ARTICLE XIV           IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS...................47
         Section 14.1.         Indenture and Notes Solely Corporate Obligations..................................47

         ARTICLE XV            CONVERSION OF NOTES...............................................................47
         Section 15.1.         Right to Convert..................................................................47
         Section 15.2.         Exercise of Conversion Privilege; Issuance of Common Stock and Preferred Stock on
                               Conversion; No Adjustment for Interest or Dividends...............................48
         Section 15.3.         No Issuance of Fractional Shares..................................................49
         Section 15.4.         Conversion Price..................................................................49
         Section 15.5.         Adjustment of Conversion Price....................................................50
         Section 15.6.         Effect of Reclassification, Consolidation, Merger or Sale.........................53
         Section 15.7.         Taxes on Shares Issued............................................................54
         Section 15.8.         Reservation of Shares to Be Fully Paid; Compliance with Governmental Requirements;
                               Listing of Common Stock and Series B Preferred Stock..............................54
         Section 15.9.         Responsibility of Trustee.........................................................55
         Section 15.10.        Notice of Holders Prior to Certain Actions........................................55

         ARTICLE XVI           MISCELLANEOUS PROVISIONS..........................................................56
         Section 16.1.         Provisions Binding on Company's Successors........................................56
         Section 16.2.         Official Acts by Successor Corporation............................................56
         Section 16.3.         Addresses for Notices, Etc........................................................57
         Section 16.4.         Governing Law.....................................................................57
         Section 16.5.         Evidence of Compliance with Conditions Precedent; Certificates to Trustee.........57
         Section 16.6.         Legal Holidays....................................................................58
</TABLE>


                                      iii
<PAGE>   65


<TABLE>
         <S>                   <C>                                                                               <C>
         Section 16.7.         Trust Indenture Act...............................................................58
         Section 16.8.         No Security Interest Created......................................................58
         Section 16.9.         Benefits of Indenture.............................................................58
         Section 16.10.        Table of Contents, Headings, Etc..................................................59
         Section 16.11.        Authenticating Agent..............................................................59
         Section 16.12.        Execution in Counterparts.........................................................60
</TABLE>


                                      iv
<PAGE>   66


         INDENTURE dated as of ____________, 2000, between ALTERRA HEALTHCARE
CORPORATION, a Delaware corporation (hereinafter sometimes called the
"Company," as more fully set forth in Section 1.1), and [Trustee], a national
banking association, as trustee hereunder (hereinafter sometimes called the
"Trustee," as more fully set forth in Section 1.1).

                                  WITNESSETH:

         WHEREAS, for its lawful corporate purposes, the Company has duly
authorized the issuance of its Series A 9.75% Convertible Senior Pay-In-Kind
Debentures due 2007 (the "Series A Notes") and its Series B 9.75% Convertible
Senior Pay-In-Kind Debentures due 2007 (the "Series B Notes") (hereinafter
sometimes collectively called the "Notes"), in an aggregate principal amount
not to exceed $ _____________ and, to provide the terms and conditions upon
which the Notes are to be authenticated, issued and delivered, the Company has
duly authorized the execution and delivery of this Indenture;

         WHEREAS, the Notes, the certificate of authentication to be borne by
the Notes, a form of assignment, and a form of conversion notice to be borne by
the Notes are to be substantially in the forms hereinafter provided for; and

         WHEREAS, all acts and things necessary to make the Notes, when
executed by the Company and authenticated and delivered by the Trustee or a
duly authorized authenticating agent, as in this Indenture provided, the valid,
binding and legal obligations of the Company, and to constitute these presents
a valid agreement according to its terms, have been done and performed, and the
execution of this Indenture and the issue hereunder of the Notes have in all
respects been duly authorized.

         NOW, THEREFORE, THIS INDENTURE WITNESSETH:

         That in order to declare the terms and conditions upon which the Notes
are, and are to be, authenticated, issued and delivered, and in consideration
of the premises and of the purchase and acceptance of the Notes by the Holders
thereof, the Company covenants and agrees with the Trustee for the equal and
proportionate benefit of the respective Holders from time to time of the Notes
(except as otherwise provided below), as follows:

                                   ARTICLE I

                                  DEFINITIONS

         Section 1.1.      Definitions.

         The terms defined in this Section 1.1 (except as herein otherwise
expressly provided or unless the context otherwise requires) for all purposes
of this Indenture and of any indenture supplemental hereto shall have the
respective meanings specified in this Section 1.1. All other terms used in this
Indenture that are defined in the Trust Indenture Act or which are by reference
therein defined in the Securities Act (except as herein otherwise expressly
provided or unless the context otherwise requires) shall have the meanings
assigned to such terms in said Trust Indenture Act and in said Securities Act
as in force at the date of the execution of this Indenture. The words "herein,"
"hereof," "hereunder," and words of similar import refer to this Indenture as


<PAGE>   67


a whole and not to any particular Article, Section or other Subdivision. The
terms defined in this Article include the plural as well as the singular.

         "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For the purposes of this definition,
"control" when used with respect to any specified Person means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

         "Agent" means any Registrar, Paying Agent or Conversion Agent or any
successor thereto.

         "Board of Directors" means either the Board of Directors of the
Company or any committee of such Board duly authorized to act for it hereunder.

         "Business Day" means any day other than (i) a Saturday or Sunday or
(ii) a day on which banking institutions in the City of New York are authorized
or required by law or executive order to remain closed.

         "Capitalized Lease Obligation" means indebtedness represented by
obligations under a lease that is required to be capitalized for financial
reporting purposes in accordance with generally accepted accounting principles;
the amount of such indebtedness shall be the capitalized amount of such
obligations determined in accordance with such principles.

         "Cash" or "cash" means such coin or currency of the United States as
at any time of payment is legal tender for the payment of public and private
debts.

         "Commission" means the Securities and Exchange Commission, as from
time to time constituted, created under the Exchange Act, or if at any time
after the execution of this instrument such Commission is not existing and
performing the duties now assigned to it under the Trust Indenture Act, then
the body performing such duties on such date.

         "Common Stock" means the common stock, par value $0.01 per share, of
the Company.

         "Company" means Alterra Healthcare Corporation until a successor
corporation shall have become such pursuant to the applicable provisions of
this Indenture, and thereafter "Company" shall mean such successor corporation.

         "Conversion Agent" shall have the meaning set forth in Section 2.4.

         "Corporate Trust Office" means the principal offices of the Trustee at
which at any particular time its corporate trust business shall be
administered, which offices as of the date of this Indenture are located at
_____________________________.

         "Default" means any event which is, or after notice or passage of
time, or both, would be, an Event of Default.


                                       2
<PAGE>   68


         "Defaulted Interest" shall have the meaning set forth in Section 2.3.

         "Event of Default" means any event specified in Section 7.1.

         "Exchange Act" means the Securities Exchange Act of 1934, as amended,
and the rules and regulations promulgated thereunder.

         "Holder" or "Noteholder" means a Person in whose name a Note is
registered on the Note Register.

         "Indebtedness" shall have the meaning set forth in Section 5.9.

         "Indenture" means this instrument as originally executed or, if
supplemented or amended as herein provided, as so supplemented or amended.

         "Interest Payment Date" means each July 1 and January 1, commencing
July 1, 2000, except that if such date is not a Business Day, then the Interest
Payment Date shall be the next date that is a Business Day.

         "Maturity" or "Maturity Date" means _______________, 2007.

         "Officer" means the Chairman of the Board, the President, the Chief
Financial Officer, the Controller, the Secretary, any Assistant Secretary or
any Vice President of the Company.

         "Officer's Certificate" means a certificate signed by two Officers,
one of whom must be the Chairman of the Board, the President, the Chief
Financial Officer or a Vice President of the Company.

         "Opinion of Counsel" means a written opinion of counsel, who may be
counsel for the Company, and who shall be acceptable to the Trustee.

         "Paying Agent" shall have the meaning set forth in Section 2.4.

         "Person" means any individual, corporation, limited liability company,
partnership, joint venture, trust, association, joint stock company,
unincorporated organization or government or any agency or political
subdivision thereof.

         "PIK Notes" shall have the meaning set forth in Section 2.3.

         "Principal" or "principal" of a debt security, including the Notes,
means the principal of the security.

         "Redemption Date," when used with respect to any Note to be redeemed,
means the date fixed for such redemption by or pursuant to this Indenture.

         "Redemption Notice Date" shall have the meaning set forth in Section
3.1.

         "Redemption Price" shall have the meaning set forth in Section 3.1.

         "Registrar" shall have the meaning set forth in Section 2.4.


                                       3
<PAGE>   69


         "Restricted Note" shall have the meaning set forth in Section 2.7(b).

         "SEC" or "Commission" means the Securities and Exchange Commission.

         "Securities Act" means the Securities Act of 1933, as amended, and the
rules and regulations promulgated thereunder.

         "Series A Conversion Price" shall have the meaning set forth in
Section 15.4.

         "Series B Conversion Price" shall have the meaning set forth in
Section 15.4.

         "Series B Preferred Stock" means the Series B Non-Voting Participating
Preferred Stock of the Company.

         "Subsidiary" means with respect to any Person, (i) any corporation,
association or other business entity of which more than 50% of the total voting
power of shares of capital stock entitled (without regard to the occurrence of
any contingency) to vote in the election of directors, managers or trustees
thereof is at the time owned or controlled, directly or indirectly, by such
person or one or more Subsidiaries of such person (or a combination thereof)
and (ii) any partnership (a) the sole general partner or managing general
partner of which is such person or a Subsidiary of such person or (b) the only
general partners of which are such person or one or more Subsidiaries of such
Person (or any combination thereof).

         "TIA" or "Trust Indenture Act" means the Trust Indenture Act of 1939
(15 U.S.C. ss.ss.77aaa-77666), as amended by the Trust Indenture Reform Act of
1990, and as in effect on the date of this Indenture, except as provided in
Sections 11.3, 15.6 and 16.5, and except to the extent any amendment to the
Trust Indenture Act expressly provides for application of the Trust Indenture
Act as in effect on another date.

         "Trading Day" or "trading day" means, with respect to any security,
each Monday, Tuesday, Wednesday, Thursday and Friday, other than any day on
which securities are not traded on the exchange or market in which such
security is traded.

         "Trading Price" on any Trading Day with respect to the per share price
of any shares of Common Stock means the mean of the reported high and low sale
price or, in case no such reported sale takes place on such day, the average of
the reported high and low bid and asked prices, in either case, on the American
Stock Exchange or, if shares of Common Stock are not listed or admitted to
trading on such exchange, on the principal national securities exchange on
which such shares are listed or admitted to trading or, if not listed or
admitted to trading on any national securities exchange, on the NASDAQ or, if
such shares are not listed or admitted to trading on any national securities
exchange or quoted on NASDAQ, the mean of the high and low bid and asked prices
in the over-the-counter market as furnished by any American Stock Exchange
member firm that is selected from time to time by the Corporation for that
purpose, or if no such bid and asked prices can be obtained from any such firm,
the fair market value of such Common Stock on such day as determined in good
faith by the Board of Directors.

         "Transfer Agent" means the transfer agent for the Common Stock as may
be designated


                                       4
<PAGE>   70


by the Company from time to time.

         "Trustee" means the party named as such in this Indenture until a
successor replaces it in accordance with the provisions of this Indenture, and
thereafter means the successor.

         "Trust Officer" means any officer of the Trustee with direct
responsibility for the administration of this Indenture or who is otherwise
exercising judgment with respect to this Indenture.

         "U.S. Government Obligations" means direct noncallable obligations of,
or noncallable obligations guaranteed by, the United States of America for the
payment of which obligation or guarantee the full faith and credit of the
United States is pledged.

         "Vice President" when used with respect to the Company, means any duly
appointed vice president, whether or not designated by a number or a word or
words added before or after the title "vice president."

         Section 1.2.      Rules of Construction.

         Unless the context otherwise requires:

         (1)      a term has the meaning assigned to it;

         (2)      an accounting term not otherwise defined has the meaning
assigned to it in accordance with generally accepted accounting principles in
effect on the date hereof, and any other reference in this Indenture to
"generally accepted accounting principles" refers to generally accepted
accounting principles in effect on the date hereof;

         (3)      words in the singular include the plural, and words in the
plural include the singular; and

         (4)      provisions apply to successive events and transactions.

                                   ARTICLE II
                                   THE NOTES

         Section 2.1.      Designation, Amount and Issue of Notes.

         The Series A Notes shall be designated as "Series A 9.75% Convertible
Senior Pay-In-Kind Debentures due 2007" and the Series B Notes shall be
designated as "Series B 9.75% Convertible Senior Pay-In-Kind Debentures" as
applicable. Notes not to exceed the aggregate principal amount of
$_____________ (except for PIK Notes issued pursuant to section 2.3 and Notes
authenticated and delivered in exchange for, or in lieu of other Notes
(including PIK Notes), or except pursuant to Sections 2.7 and 2.8 hereof) from
time to time hereafter, may be executed by the Company and delivered to the
Trustee for authentication, and the Trustee shall thereupon authenticate and
deliver said Notes to or upon the written order of the Company, signed by its
(a) Chairman of the Board, President or any Vice President and (b) Treasurer or
Assistant Treasurer or its Secretary or Assistant Secretary, without any
further action by the


                                       5
<PAGE>   71


Company hereunder. The Company shall, consistent with the provisions of this
Indenture and the other contractual obligations of the Company, designate
whether Notes to be issued shall be Series A Notes or Series B Notes.

         Section 2.2.      Form of Notes.

         The Series A Notes and the Series B Notes and the Trustee's
certificate of authentication to be borne by such Notes shall be substantially
in the form set forth in Exhibit A and Exhibit B, respectively, which are
incorporated in and made a part of this Indenture, with such appropriate
insertions, omissions, substitutions and other variations as are required or
permitted by this Indenture.

         Any of the Notes may have such letters, numbers or other marks of
identification and such notations, legends and endorsements as the Officers
executing the same may approve (execution thereof to be conclusive evidence of
such approval) and as are not inconsistent with the provisions of this
Indenture, or as may be required to comply with any law or with any rule or
regulation made pursuant thereto or with any rule or regulation of any
securities exchange or automated quotation system on which the Notes may be
listed, or to conform to usage.

         The terms and provisions contained in the forms of Notes attached as
Exhibit A and Exhibit B hereto shall constitute, and are hereby expressly made,
a part of this Indenture and, to the extent applicable, the Company and the
Trustee, by their execution and delivery of this Indenture, expressly agree to
such terms and provisions and to be bound thereby.

         Neither the Company nor the Trustee shall have any responsibility for
any defect in the CUSIP number that appears on any Note, check, advice of
payment or redemption notice, and any such document may contain a statement to
the effect that CUSIP numbers have been assigned by an independent service for
convenience of reference and that neither the Company nor the Trustee shall be
liable for any inaccuracy in such numbers.

         Section 2.3.      Date and Denomination of Notes; Payments of
                           Interest.

         (a)      The Notes shall be issuable in registered form without
coupons in denominations of $1,000 principal amount. Every Note shall bear
interest at the rate of 9.75% per annum, as adjusted from time to time pursuant
to the provisions of this Indenture, (the "Interest Rate") from the applicable
Issuance Date. Interest on the Notes shall be paid semi-annually in arrears on
each Interest Payment Date. Interest on the Notes shall be computed on the
basis of a 360-day year.

         (b)      For purposes of this Section 2.3, the following terms shall
have the meaning indicated:

                  (1)      "PIK Notes" means additional Notes issued by the
Company on each Interest Payment Date in lieu of cash interest, in an aggregate
principal amount equal to the amount of such cash interest that otherwise would
be due, which PIK Notes shall be identical to the Series B Notes, except such
PIK Notes shall be dated as of the applicable Interest Payment Date and shall
bear interest from their Issuance Date.

                  (2)      "Record Date" shall mean, with respect to any
Interest Payment Date, the


                                       6
<PAGE>   72


December 15 or June 15 preceding said January 1 or July 1, respectively.

         (c)      On each Interest Payment Date, the Company shall, in lieu of
the payment of interest in cash, execute and require the Trustee (upon Company
order given not less than 10 days prior to such Interest Payment Date) to
authenticate for original issue and issue to the appropriate Holders, PIK Notes
in an aggregate principal amount equal to the amount of interest due on such
Interest Payment Date. The issuance of such PIK Notes shall constitute full
payment of such interest; provided, however, that no fractional PIK Note shall
be issued. In the event that any such interest payment would result in the
issuance to a Holder of a PIK Note in a principal amount which is less than
$1,000 (such principal amount, if less than $1,000, or, if such principal
amount is greater than $1,000, the difference between such principal amount and
the highest integral multiple of $1,000 which is less than such principal
amount, being referred to as a "Fractional Principal Amount"), such Fractional
Principal Amount shall be aggregated with any Fractional Principal Amount
otherwise issuable to such Holder in connection with any subsequent Interest
Payment Date and each time Fractional Principal Amounts with respect to such
Holder shall equal $1,000, a PIK Note shall be issued to such Holder.
Notwithstanding the preceding sentence, the Company may, at its option, on any
Interest Payment Date pay to Holders otherwise entitled to any Fractional
Principal Amounts, cash in an amount equal to the aggregate Fractional
Principal Amounts due to such Holders.

         (d)      The Person in whose name any Note is registered at the close
of business on any record date with respect to any Interest Payment Date
(including any Note that is converted after the record date and on or before
the Interest Payment Date), shall be entitled to receive the interest payable
on such Interest Payment Date notwithstanding the cancellation of such Note
upon any transfer or exchange subsequent to the record date and on or prior to
such Interest Payment Date, provided, that in the case of any Note, or portion
thereof, called for redemption or delivered for conversion on a Redemption Date
or Conversion Date (as applicable) that is after a record date and prior to
(but excluding) the next succeeding Interest Payment Date, interest shall not
be paid to the Person in whose name the Note, or portion thereof, is registered
on the close of business on such record date and the Company shall have no
obligation to pay interest on such Note or such portion except to the extent
required to be paid upon redemption or conversion of such Note or portion
thereof pursuant to Section 3.1 or 15.1 hereof.

         (e)      If at any time the Common Stock is not listed or admitted to
trading on the American Stock Exchange, the New York Stock Exchange or the
NASDAQ National Market System (each a "National Exchange"), then beginning on
the date the Common Stock is no longer so listed or admitted to trading and
continuing until the date the Common Stock is again listed or admitted to
trading on a National Exchange, the Interest Rate shall be adjusted to 12.25%
per annum.

         (f)      Any interest on any Note which is payable, but is not
punctually paid or duly provided for, on any Interest Payment Date (herein
called "Defaulted Interest") shall be paid by the Company, at its election in
each case, as provided in clause (1) or (2) below:


                                       7
<PAGE>   73


                  (1)      The Company may elect to make payment of any
Defaulted Interest to the Persons in whose names Notes are registered at the
close of business on a special record date for the payment of such Defaulted
Interest, which shall be fixed in the following manner. The Company shall
notify the Trustee in writing of the amount of Defaulted Interest to be paid on
each Note and the date of payment (which shall not be less than 25 days after
the receipt by the Trustee of such notice, unless the Trustee shall consent to
an earlier date), and at the same time the Company shall execute and require
the Trustee to authenticate for original issue, and issue to such persons PIK
Notes equal to the aggregate amount to be paid in respect of such Defaulted
Interest. Thereupon the Trustee shall fix a special record date for the payment
of such Defaulted Interest which shall be not more than 15 days and not less
than ten (10) days prior to the date of the proposed payment and not less than
ten (10) days after the receipt by the Trustee of the notice of the proposed
payment. The Trustee shall promptly notify the Company of such special record
date and, in the name and at the expense of the Company, shall cause notice of
the proposed payment of such Defaulted Interest and the special record date
therefor to be mailed, first-class postage prepaid, to each Noteholder at his
address as it appears in the Note register, not less than ten (10) days prior
to such special record date. Notice of the proposed payment of such Defaulted
Interest and the special record date therefor having been so mailed, such
Defaulted Interest shall be paid to the Persons in whose names the Notes were
registered at the close of business on such special record date and shall no
longer be payable pursuant to the following clause (2).

                  (2)      The Company may make payment of any Defaulted
Interest in any other lawful manner not inconsistent with the requirements of
any securities exchange or automated quotation system on which the Notes may be
listed or designated for listing, and upon such notice as may be required by
such exchange or automated quotation system, if, after notice is given by the
Company in writing to the Trustee of the proposed payment pursuant to this
clause, such manner of payment shall be deemed practicable by the Trustee.

         SECTION 2.4.      Execution of Notes.

         The Notes shall be signed in the name and on behalf of the Company by
the manual or facsimile signature of its Chairman of the Board, President or
any Vice President and attested by the manual or facsimile signature of its
Secretary or any of its Assistant Secretaries (which may be printed, engraved
or otherwise reproduced thereon, by facsimile or otherwise). Only such Notes as
shall bear thereon a certificate of authentication substantially in the form
set forth on the form of Note attached as Exhibit A hereto or the form of Note
attached as Exhibit B hereto, as applicable, manually executed by the Trustee
(or an authenticating agent appointed by the Trustee as provided by Section
16.11), shall be entitled to the benefits of this Indenture or be valid or
obligatory for any purpose. Such certificate by the Trustee (or such an
authenticating agent) upon any Note executed by the Company shall be conclusive
evidence that the Note so authenticated has been duly authenticated and
delivered hereunder and that the Holder is entitled to the benefits of this
Indenture. Each Note shall be dated the date of its authentication.

         In case any Officer who shall have signed any of the Notes shall cease
to be such Officer before the Notes so signed shall have been authenticated and
delivered by the Trustee, or disposed of by the Company, such Notes
nevertheless may be authenticated and delivered or disposed of as though the
Person who signed such Notes had not ceased to be such Officer and


                                       8
<PAGE>   74


any Note may be signed on behalf of the Company by such Persons as, at the
actual date of the execution of such Note, shall be the proper Officers,
although at the date of the execution of this Indenture any such Person was not
such an Officer.

         The Company shall maintain an office or agency where Notes may be
presented for registration of transfer or for exchange (the "Registrar"), an
office or agency where Notes may be presented for payment (the "Paying Agent"),
an office or agency where Notes may be presented for conversion (the
"Conversion Agent") and an office or agency where notices and demands to or
upon the Company in respect of the Notes and this Indenture may be served. The
Registrar shall keep a register of the Notes and of their transfer and
exchange.

         The Company shall enter into an appropriate agency agreement with any
Agent not a party to this Indenture. The agreement shall implement the
provisions of this Indenture that relate to such Agent. The Company shall
notify the Trustee in writing of the name and address of any Agent not a party
to this Indenture. If the Company fails to maintain a Registrar, Paying Agent,
Conversion Agent or agent for service of notices and demands, or fails to give
the foregoing notice, the Trustee shall act as such.

         The Company initially appoints the Trustee as Registrar, Paying Agent,
Conversion Agent and agent for service of notices and demands in connection
with the Notes.

         Section 2.5.      Paying Agent to Hold Money in Trust.

         On or prior to each due date of the principal of any Notes, the
Company shall deposit with the Paying Agent a sum sufficient to pay such
principal so becoming due. Subject to Sections 4.1, 4.2 and 4.3, the Paying
Agent shall hold in trust for the benefit of Holders or the Trustee all money
held by the Paying Agent for the payment of principal of and any accrued but
unpaid interest on the Notes, and shall notify the Trustee of any default by
the Company (or any other obligor on the Notes) in making any such payment. If
the Company or an Affiliate of the Company acts as Paying Agent, it shall, on
or before each due date of the principal of any Notes, segregate the money and
hold it as a separate trust fund. The Company at any time may require a Paying
Agent to pay all money held by it to the Trustee and the Trustee may at any
time during the continuance of any default, upon written request to a Paying
Agent, require such Paying Agent to forthwith pay to the Trustee all sums so
held in trust by such Paying Agent. Upon doing so, the Paying Agent (other than
the Company) shall have no further liability for the money.

         Section 2.6.      Noteholder Lists.

         The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Holders. If the Trustee is not the Registrar, the Company shall furnish to the
Trustee on or before each Interest Payment Date and at such other times as the
Trustee may request in writing a list in such form and as of such date as the
Trustee may reasonably require of the names and addresses of Holders, and the
Company shall otherwise comply with TIA Section 312(a).


                                       9
<PAGE>   75


         Section 2.7.      Exchange and Registration of Transfer of Notes;
                           Restrictions on Transfer; Depositary.

         (a)      The Company shall cause to be kept at the Corporate Trust
Office a register (the register maintained in such office and in any other
office or agency of the Company designated pursuant to Section 5.3 being herein
sometimes collectively referred to as the "Note register") in which, subject to
such reasonable regulations as it may prescribe, the Company shall provide for
the registration of Notes and of transfers of Notes. The Note register shall be
in written form or in any form capable of being converted into written form
within a reasonably prompt period of time. The Trustee is hereby appointed
"Registrar" for the purpose of registering Notes and transfers of Notes as
herein provided. The Company may appoint one or more co-Registrars in
accordance with Section 5.3.

         Upon surrender for registration of transfer of any Note to the
Registrar or any co-Registrar, and satisfaction of the requirements for such
transfer set forth in this Section 2.7, the Company shall execute, and the
Trustee shall authenticate and deliver, in the name of the designated
transferee or transferees, one or more new Notes of any authorized
denominations and of a like aggregate principal amount and bearing such
restrictive legends as may be required by this Indenture.

         Notes may be exchanged for other Notes (of the same series) of any
authorized denominations and of a like aggregate principal amount, upon
surrender of the Notes to be exchanged at any such office or agency maintained
by the Company pursuant to Section 5.3. Whenever any Notes are so surrendered
for exchange, the Company shall execute, and the Trustee shall authenticate and
deliver, the Notes, which the Holder making the exchange is entitled to
receive, bearing registration numbers not contemporaneously outstanding.

         Whenever any Notes are to be issued pursuant to this Indenture, the
Company shall deliver to the Trustee an Officer's Certificate specifying the
amount and series of Notes to be authenticated and certifying that all
conditions precedent to the issuance of such Notes contained in this Indenture
have been complied with.

         All Notes issued upon any registration of transfer or exchange of
Notes shall be the valid obligations of the Company, evidencing the same debt,
and entitled to the same benefits under this Indenture, as the Notes
surrendered upon such registration of transfer or exchange.

         All Notes presented or surrendered for registration of transfer or for
exchange, redemption or conversion shall (if so required by the Company or the
Registrar) be duly endorsed, or be accompanied by a written instrument or
instruments of transfer in form satisfactory to the Company and the Trustee,
and the Notes shall be duly executed by the Holder thereof or his attorney duly
authorized in writing.

         No service charge shall be made for any registration of transfer or
exchange of Notes, but the Company or the Trustee may require payment of a sum
sufficient to cover any tax, assessment or other governmental charge that may
be imposed in connection with any registration of transfer or exchange of
Notes.


                                      10
<PAGE>   76


         Neither the Company nor the Trustee nor any Registrar nor any
co-Registrar shall be required to exchange or register a transfer of (a) any
Notes called for redemption pursuant to Article III or (b) any Notes or
portions thereof surrendered for conversion pursuant to Article XV.

         (b)      Every Note that bears or is required under this Section
2.7(b) to bear the legend set forth in this Section 2.7(b) (together with any
Common Stock or Preferred Stock issued upon conversion of the Notes and
required to bear the legend set forth in Section 2.7(c), collectively, the
"Restricted Notes") shall be subject to the restrictions on transfer set forth
in this Section 2.7(b) (including those set forth in the legend set forth
below) unless such restrictions on transfer shall be waived by written consent
of the Company (with written notice to the Trustee), and the Holder of each
such Restricted Note, by such Noteholder's acceptance thereof, agrees to be
bound by all such restrictions on transfer. As used in Section 2.7(b) and
2.7(c), the term "transfer" encompasses any sale, pledge, transfer or other
disposition whatsoever of any Restricted Note.

         Until two (2) years after the original issuance date of any Note, any
certificate evidencing such Note (and all Notes issued in exchange therefor or
substitution thereof, other than Common Stock or Preferred Stock, if any,
issued upon conversion thereof, which shall bear the legend set forth in
Section 2.7(c), if applicable) shall bear a legend in substantially the
following form, unless otherwise agreed by the Company in writing, with written
notice thereof to the Trustee:

         THE NOTE EVIDENCED HEREBY HAS NOT BEEN AND WILL NOT BE REGISTERED
UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") OR ANY
STATE SECURITIES LAWS, AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD, EXCEPT AS
SET FORTH BELOW.

BY ITS ACQUISITION HEREOF, THE HOLDER: (1) REPRESENTS THAT IT IS AN "ACCREDITED
INVESTOR" AS DEFINED IN THE RULES PROMULGATED UNDER THE SECURITIES ACT; (2)
AGREES THAT IT WILL NOT PRIOR TO THE DATE THAT IS TWO YEARS AFTER THE LATER OF
THE ORIGINAL ISSUANCE OF THE NOTE EVIDENCED HEREBY AND THE LAST DATE ON WHICH
ALTERRA HEALTHCARE CORPORATION (THE "COMPANY") OR ANY "AFFILIATE" (AS DEFINED IN
RULE 144 UNDER THE SECURITIES ACT) OF THE COMPANY WAS THE OWNER OF THE NOTE (THE
"RESTRICTION TERMINATION DATE") RESELL OR OTHERWISE TRANSFER THE NOTE EVIDENCED
HEREBY OR THE COMMON STOCK OR PREFERRED STOCK ISSUABLE UPON CONVERSION OF SUCH
NOTE EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO AN ACCREDITED
INVESTOR (AS DEFINED IN RULE 501 UNDER THE SECURITIES ACT) THAT, PRIOR TO SUCH
TRANSFER, FURNISHES TO [TRUSTEE], AS TRUSTEE (OR A SUCCESSOR TRUSTEE, AS
APPLICABLE), A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS
RELATING TO THE RESTRICTIONS ON TRANSFER OF THE NOTE EVIDENCED HEREBY (THE FORM
OF WHICH LETTER CAN BE OBTAINED FROM SUCH TRUSTEE OR A SUCCESSOR TRUSTEE, AS
APPLICABLE), (C) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE
144 UNDER THE SECURITIES ACT (IF AVAILABLE), OR (D) PURSUANT TO A REGISTRATION
STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT (AND WHICH
CONTINUES TO BE


                                      11
<PAGE>   77


EFFECTIVE AT THE TIME OF SUCH TRANSFER); AND (3) AGREES THAT IT WILL DELIVER TO
EACH PERSON TO WHOM THE NOTE EVIDENCED HEREBY IS TRANSFERRED A NOTICE
SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

         IN CONNECTION WITH ANY TRANSFER OF THE NOTE EVIDENCED HEREBY BEFORE
THE RESTRICTION TERMINATION DATE, THE HOLDER MUST CHECK THE APPROPRIATE BOX SET
FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT
THIS NOTE TO [TRUSTEE], AS TRUSTEE (OR A SUCCESSOR TRUSTEE, AS APPLICABLE). IF
THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (B) OR (C) ABOVE, THE HOLDER MUST,
PRIOR TO SUCH TRANSFER, FURNISH TO [TRUSTEE], AS TRUSTEE (OR A SUCCESSOR
TRUSTEE, AS APPLICABLE), SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER
INFORMATION AS IT MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING
MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT.

         Any Note (or security issued in exchange or substitution therefor) as
to which such restrictions on transfer shall have expired in accordance with
their terms or as to which the conditions for removal of the foregoing legend
set forth therein have been satisfied may, upon surrender of such Note for
exchange to the Registrar in accordance with the provisions of this Section
2.7, be exchanged for a new Note or Notes, of like tenor and aggregate
principal amount, which shall not bear the restrictive legend required by this
Section 2.7(b).

         (c)      Until two (2) years after the original issuance date of any
Note, any stock certificate representing Common Stock or Series B Preferred
Stock issued upon conversion of such Note shall bear a legend in substantially
the following form, unless such Common Stock or Series B Preferred Stock has
been transferred pursuant to a registration statement that has been declared
effective under the Securities Act (and which continues to be effective at the
time of such transfer) or such Common Stock or Series B Preferred Stock has
been issued upon conversion of Notes that have been transferred pursuant to a
registration statement that has been declared effective under the Securities
Act, or unless otherwise agreed by the Company in writing with written notice
thereof to the Transfer Agent and the Registrar:

         THE COMMON STOCK (OR PREFERRED STOCK, IF APPLICABLE) EVIDENCED HEREBY
HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE
"SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND, ACCORDINGLY, MAY NOT BE
OFFERED OR SOLD AS SET FORTH BELOW.

         THE HOLDER HEREOF AGREES THAT PRIOR TO THE DATE THAT IS TWO YEARS
AFTER THE LATER OF THE ORIGINAL ISSUANCE OF THE NOTE UPON THE CONVERSION OF
WHICH THE COMMON STOCK (OR PREFERRED STOCK, IF APPLICABLE) EVIDENCED HEREBY WAS
ISSUED AND THE LAST DATE ON WHICH ALTERRA HEALTHCARE CORPORATION (THE COMPANY")
OR ANY "AFFILIATE" (AS DEFINED IN RULE 144 UNDER THE SECURITIES ACT) OF THE
COMPANY WAS THE OWNER OF THE NOTE OR THE COMMON STOCK (OR PREFERRED STOCK, IF
APPLICABLE) EVIDENCED HEREBY (THE "RESTRICTION TERMINATION DATE"); (1)


                                      12
<PAGE>   78


IT WILL NOT RESELL OR OTHERWISE TRANSFER THE COMMON STOCK (OR PREFERRED STOCK,
IF APPLICABLE) EVIDENCED HEREBY EXCEPT (A) TO THE COMPANY, OR ANY SUBSIDIARY
THEREOF, (B) TO AN "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501 UNDER THE
SECURITIES ACT) THAT, PRIOR TO SUCH TRANSFER FURNISHES TO [TRANSFER AGENT], AS
THE COMPANY'S TRANSFER AGENT, A SIGNED LETTER CONTAINING CERTAIN
REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THE
COMMON STOCK (OR PREFERRED STOCK, IF APPLICABLE) EVIDENCED HEREBY (THE FORM OF
WHICH LETTER CAN BE OBTAINED FROM SUCH TRANSFER AGENT), (C) PURSUANT TO THE
EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF
AVAILABLE), OR (D) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT (AND WHICH CONTINUES TO BE EFFECTIVE AT THE
TIME OF SUCH TRANSFER); (2) PRIOR TO SUCH TRANSFER BEFORE THE RESTRICTION
TERMINATION DATE (OTHER THAN A TRANSFER PURSUANT TO CLAUSE 1(D) ABOVE), IT WILL
FURNISH THE COMPANY'S TRANSFER AGENT, SUCH CERTIFICATIONS, LEGAL OPINIONS OR
OTHER INFORMATION AS IT MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS
BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO,
THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND (3) IT WILL DELIVER TO
EACH PERSON TO WHOM THE COMMON STOCK (OR PREFERRED STOCK, IF APPLICABLE)
EVIDENCED HEREBY IS TRANSFERRED (OTHER THAN A TRANSFER PURSUANT TO CLAUSE 1(D)
ABOVE) A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

         Any such Common Stock (or Series B Preferred Stock, if applicable) as
to which such restrictions on transfer shall have expired in accordance with
their terms or as to which the conditions for removal of the foregoing legend
set forth therein have been satisfied may, upon surrender of the certificates
representing such shares of Common Stock (or Series B Preferred Stock, if
applicable) for exchange in accordance with the procedures of the transfer
agent for the Common Stock (or Series B Preferred Stock, if applicable), be
exchanged for a new certificate or certificates for a like number of shares of
Common Stock (or Series B Preferred Stock, if applicable), which shall not bear
the restrictive legend required by this Section 2.7(c). The Company shall
advise the Trustee in writing as to the termination of the restricted period
and the Trustee may rely conclusively thereon.

         (d)      Any certificate evidencing a Note that has been transferred
to an Affiliate of the Company within two (2) years after the original issuance
date of the Note, as evidenced by a notation on the Assignment Form for such
transfer or in any representation letter delivered in respect thereof, shall,
until two (2) years after the last day on which the Company or any Affiliate of
the Company was an owner of such Note, bear a legend in substantially the
following form, unless otherwise agreed by the Company (with written notice
thereof to the Trustee):

         THE NOTE EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE U.S.
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE
SECURITIES LAWS, AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT AS SET
FORTH IN THE FOLLOWING SENTENCE.


                                      13
<PAGE>   79


         BY ACQUISITION HEREOF, THE HOLDER AGREES (1) THAT IT WILL NOT RESELL
OR OTHERWISE TRANSFER THE NOTE EVIDENCED HEREBY OR THE COMMON STOCK (OR
PREFERRED STOCK, IF APPLICABLE) ISSUABLE UPON CONVERSION OF SUCH NOTE EXCEPT
(A) TO ALTERRA HEALTHCARE CORPORATION OR ANY SUBSIDIARY THEREOF, (B) IN A
TRANSACTION REGISTERED UNDER THE SECURITIES ACT OR (C) PURSUANT TO THE
EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF
AVAILABLE) AND (2) THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE NOTE
EVIDENCED HEREBY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS
LEGEND. THIS LEGEND SHALL BE REMOVED UPON THE TRANSFER OF THE NOTE EVIDENCED
HEREBY OR THE COMMON STOCK (OR PREFERRED STOCK, IF APPLICABLE) ISSUABLE UPON
CONVERSION OF SUCH NOTE PURSUANT TO THE IMMEDIATELY PRECEDING SENTENCE.

         IF THE PROPOSED TRANSFER IS PURSUANT TO THE EXEMPTION FROM
REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT, THE HOLDER MUST,
PRIOR TO SUCH TRANSFER, PROVIDE [TRUSTEE], AS TRUSTEE (OR A SUCCESSOR TRUSTEE,
AS APPLICABLE), SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS THE
COMPANY MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE
PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT.

         Any stock certificate representing Common Stock or Series B Preferred
Stock issued upon conversion of such Note shall also bear a legend in
substantially the form indicated above, unless otherwise agreed by the Company
(with written notice thereof to the Trustee).

         Section 2.8.      Mutilated, Destroyed, Lost or Stolen Notes.

         In case any Note shall become mutilated or be destroyed, lost or
stolen, the Company in its discretion may execute and upon receipt of an
Officer's Certificate for the authentication and delivery of Notes, the
Trustee, or an authenticating agent appointed by the Trustee, shall
authenticate and deliver a new Note, bearing a number not contemporaneously
outstanding, in exchange and substitution for the mutilated Note, or in lieu of
and in substitution for the Note so destroyed, lost or stolen. In every case
the applicant for a substituted Note shall furnish to the Company, to the
Trustee and, if applicable, to such authenticating agent such security or
indemnity as may be required by them to save each of them harmless for any
loss, liability, cost or expense caused by or connected with such substitution,
and, in every case of destruction, loss or theft, the applicant shall furnish
to the Company, to the Trustee and, if applicable, to such authenticating agent
evidence to their satisfaction of the destruction, loss or theft of such Note
and of the ownership thereof.

         The Trustee or such authenticating agent may authenticate any such
substituted Note and deliver the same upon the receipt of such security or
indemnity as the Trustee, the Company and, if applicable, such authenticating
agent may require. Upon the issuance of any substituted Note, the Company or
the Trustee may require the payment of a sum sufficient to cover any tax or
other governmental charge that may be imposed in relation thereto and any other
expenses


                                      14
<PAGE>   80


connected therewith. In case any Note which has matured or is about to mature
or has been called for redemption or is about to be converted into Common Stock
(or Preferred Stock, if applicable) shall become mutilated or be destroyed,
lost or stolen, the Company may, instead of issuing a substitute Note, pay or
authorize the payment of or convert or authorize the conversion of the same
(without surrender thereof except in the case of a mutilated Note), as the case
may be, if the applicant for such payment or conversion shall furnish to the
Company, to the Trustee and, if applicable, to such authenticating agent such
security or indemnity as may be required by them to save each of them harmless
for any loss, liability, cost or expense caused by or connected with such
substitution, and, in case of destruction, loss or theft, evidence satisfactory
to the Company, the Trustee and, if applicable, any Paying Agent or Conversion
Agent of the destruction, loss or theft of such Note and of the ownership
thereof.

         Every substitute Note issued pursuant to the provisions of this
Section 2.8 by virtue of the fact that any Note is mutilated, destroyed, lost
or stolen shall constitute an additional contractual obligation of the Company,
whether or not the mutilated, destroyed, lost or stolen Note shall be found at
any time, and shall be entitled to all the benefits of (but shall be subject to
all the limitations set forth in) this Indenture equally and proportionally
with any and all other Notes duly issued hereunder. To the extent permitted by
law, all Notes shall be held and owned upon the express condition that the
foregoing provisions are exclusive with respect to the replacement or payment
or conversion of mutilated, destroyed, lost or stolen Notes and shall preclude
any and all other rights or remedies notwithstanding any law or statute
existing or hereafter enacted to the contrary with respect to the replacement
or payment or conversion of negotiable instruments or other securities without
their surrender.

         Section 2.9.      Treasury Notes.

         In determining whether the Holders of the required principal amount of
Notes have concurred in any notice, direction, waiver or consent, Notes owned
by the Company or any other obligor on the Notes shall be disregarded, except
that, for purposes of determining whether the Trustee shall be protected in
relying on any such notice, direction, waiver or consent, only Notes which a
Trust Officer knows are so owned shall be so disregarded. Notes so owned which
have been pledged in good faith shall not be disregarded if the pledgee
establishes to the satisfaction of the Trustee the pledgee's right so to act
with respect to the Notes and that the pledgee is not the Company or any other
obligor on the Notes.

         Section 2.10.     Temporary Notes.

         Until definitive Notes are ready for delivery, the Company may prepare
and execute, and, upon the order of the Company, the Trustee, upon receipt of
an Officer's Certificate for the authentication and delivery of Notes, shall
authenticate and deliver temporary Notes. Temporary Notes shall be
substantially in the form of definitive Notes but may have variations that the
Company, with the consent of the Trustee, considers appropriate for temporary
Notes (as conclusively evidenced by its execution of such Notes). Without
unreasonable delay, the Company shall prepare and execute and the Trustee, upon
receipt of an Officer's Certificate for the authentication and delivery of
Notes, shall authenticate and deliver definitive Notes in


                                      15
<PAGE>   81


exchange for temporary Notes. Until so exchanged, the Temporary Notes shall in
all respects be entitled to the same benefits under this Indenture as
definitive Notes.

         Section 2.11.     Cancellation.

         All Notes surrendered for the purpose of payment, redemption,
conversion, exchange or registration of transfer, shall, if surrendered to the
Company or any Paying Agent or any Registrar or any Conversion Agent, be
surrendered to the Trustee and promptly canceled by it, or, if surrendered to
the Trustee, shall be promptly canceled by it, and no Notes shall be issued in
lieu thereof except as expressly permitted by any of the provisions of this
Indenture. The Trustee shall destroy cancelled Notes (unless the Company
directs it in writing to do otherwise) and, after such destruction, shall, if
requested by the Company, deliver a certificate of such destruction to the
Company. If the Company shall acquire any of the Notes, such acquisitions shall
not operate as a redemption or satisfaction of the indebtedness represented by
such Notes unless and until the same are delivered to the Trustee for
cancellation.

         Section 2.12.     Deposit of Funds.

         Prior to 10:00 a.m. New York City time on the Maturity Date, the
Company shall deposit with the Paying Agent in immediately available funds
sufficient to make cash payments, if any, due on Maturity Date, in a timely
manner which permits the Paying Agent to remit payment to the Holders on the
Maturity Date.

                                  ARTICLE III
                              REDEMPTION OF NOTES

         Section 3.1.      Right to Redeem; Notice to Trustee.

         (a)      The Notes shall not be redeemable at the option of the
Company prior to ________, 2003. After ____________, 2003, and prior to the
Maturity Date, the Company may, at its option, redeem all, but not less than
all, of the outstanding Notes, upon notice as set forth in Section 3.1(b) at
the Redemption Price (as defined below), at any time within 5 days of any date
on which the average Trading Price of the Common Stock for the 30 consecutive
Trading Days preceding the Redemption Notice Date (as defined in Section
3.1(b)) exceeds the Conversion Price by an amount equal to 200% of the
Conversion Price; The Redemption Price for each Note shall be an amount in cash
equal to the principal amount of such Note plus all accrued but unpaid interest
up to but not including the Redemption Date.

         (b)      If the Company elects to redeem the Notes pursuant to this
Section 3.1 and paragraph 6 of the Notes, then at least 60 days before the
Redemption Date, the Company shall mail or cause to be mailed a notice of
redemption by first-class mail to the Trustee and to each Holder of Notes to be
redeemed at such Holder's address as it appears on the Note register. The date
such notice is first mailed to the Trustee shall be the Redemption Notice Date.

         The notice shall identify the Notes to be redeemed and shall state:

         (1)      the Redemption Date;


                                      16
<PAGE>   82


         (2)      the Redemption Price;

         (3)      the then current Conversion Price;

         (4)      the name and address of the Paying Agent and the Conversion
Agent;

         (5) that Notes called for redemption must be presented and surrendered
to the Paying Agent to collect the Redemption Price;

         (6) that the Notes called for redemption may be converted at any time
before the close of business on the fifth Business Day immediately preceding
the Redemption Date;

         (7)      that Holders who wish to convert Notes must satisfy the
requirements in paragraph 7 of the Notes;

         (8) that, unless the Company defaults in making the redemption
payment, the only remaining right of the Holder shall be to receive payment of
the Redemption Price upon presentation and surrender to the Paying Agent of the
Notes;

         (10)     that interest on Notes called for redemption ceases to accrue
on and after the Redemption Date.

         At the Company's written request, the Trustee shall give the notice of
redemption in the Company's name and at the Company's expense.

         Section 3.2.      Effect of Notice of Redemption.

         Once notice of redemption is mailed by the Company, or by the Trustee
at the written request of the Company, Notes called for redemption become due
and payable on the Redemption Date and at the Redemption Price stated in the
notice, except for Notes that are converted in accordance with the provisions of
Article XV. Upon presentation and surrender to the Paying Agent, Notes called
for redemption shall be paid at the Redemption Price.

         Section 3.3.      Deposit of Redemption Price.

         On or before 10:00 a.m. New York City time on any Redemption Date, the
Company shall deposit with the Paying Agent money sufficient to pay the
Redemption Price of all Notes to be redeemed on that date, other than Notes or
portions thereof called for redemption on that date which have been delivered
by the Company to the Trustee for cancellation or have been converted. The
Paying Agent shall promptly return to the Company any money not required for
that purpose because of the conversion of Notes pursuant to Article XV or
otherwise. If such money is instead held by the Company or an Affiliate of the
Company in trust and is not required for such purpose, it shall be discharged
from the trust.

         Section 3.4.      Conversion Arrangement on Call for Redemption.

         In connection with any redemption of Notes, the Company may arrange
for the purchase and conversion of any Notes by an agreement with one or more
investment bankers or other


                                      17
<PAGE>   83


purchasers to purchase such Notes by paying to the Trustee in trust for the
Holders, on or before the date fixed for redemption, an amount not less than
the applicable Redemption Price of such Notes. Notwithstanding anything to the
contrary contained in this Article III, the obligation of the Company to pay
the Redemption Price of such Notes shall be deemed to be satisfied and
discharged to the extent such amount is so paid by such purchasers. If such an
agreement is entered into (a copy of which shall be filed with the Trustee
prior to the date fixed for redemption), any Notes not duly surrendered for
conversion by the Holders thereof may, at the option of the Company, be deemed,
to the fullest extent permitted by law, acquired by such purchasers from such
Holders and surrendered by such purchasers for conversions, all as of
immediately prior to the close of business on the date fixed for redemption
(and the right to convert any such Notes shall be extended through such time),
subject to payment of the above amount as aforesaid. At the written direction
of the Company, the Trustee shall hold and dispose of any such amount paid to
it in the same manner as it would monies deposited with it by the Company for
the redemption of Notes. Without the Trustee's prior written consent, no
arrangement between the Company and such purchasers for the purchase and
conversion of any Notes shall increase or otherwise affect any of the powers,
duties, responsibilities or obligations of the Trustee as set forth in this
Indenture, and the Company agrees to indemnify the Trustee from, and hold it
harmless against, any loss, liability or expense arising out of or in
connection with any such arrangement for the purchase and conversion of any
Notes between the Company and such purchasers to which the Trustee has not
consented in writing, including the costs and expenses, including reasonable
legal fees, incurred by the Trustee in the defense of any claim or liability
arising out of or in connection with the exercise or performance of any of its
powers, duties, responsibilities or obligations under this Indenture.

                                   ARTICLE IV
                                    RANKING

         The Notes shall rank (i) senior to the Company's subordinated
indebtedness, including without limitation the Company's 5.25% Convertible
Subordinated Debentures due 2002, the Company's 7% Convertible Subordinated
Debentures due 2004, the Company's 6.75% Convertible Subordinated Debentures
due 2006 and any other debentures subsequently issued by the Company and (ii)
pari passu with all other Indebtedness of the Company.

                                   ARTICLE V
                                   COVENANTS

         Section 5.1.      Payment of Notes.

         The Company shall promptly make all payments in respect of the Notes
on the dates and in the manner provided in the Notes and this Indenture. An
installment of principal or interest shall be considered paid on the date it is
due if the Trustee or Paying Agent (other than the Company or an Affiliate of
the Company) holds on that date money deposited by the Company or an Affiliate
thereof sufficient to pay the installment or, if applicable, PIK Notes executed
by the Company sufficient to pay such installment. The Company shall pay
interest on overdue principal at the Interest Rate (as adjusted from time to
time pursuant to the provisions hereof); it shall pay interest on overdue
installments of interest at the same rate to the extent lawful.


                                      18
<PAGE>   84


         Section 5.2.      SEC Reports.

         The Company shall file all reports and other information and documents
which it is required to file with the SEC pursuant to Section 13 or 15(d) of
the Exchange Act. The Company will cause any quarterly and annual reports which
it mails to its stockholders to be mailed to the Holders.

         During the period beginning on the latest date of the original issuance
of the Notes and ending on the date that is two (2) years from such date, the
Company covenants and agrees that it shall, during any period in which it is not
subject to Section 13 or 15(d) under the Exchange Act, make available to any
Holder or beneficial Holder of Notes or any Common Stock or Series B Preferred
Stock issued upon conversion thereof which continue to be Restricted Notes in
connection with any sale thereof and any prospective purchaser of Notes or such
Common Stock or Series B Preferred Stock from such Holder or beneficial Holder,
the information required pursuant to Rule 144A(d)(4) under the Securities Act
upon the request of any Holder or beneficial Holder of such Notes or such Common
Stock or Series B Preferred Stock and it will take such further action as any
Holder or beneficial Holder of such Notes or such Common Stock or Series B
Preferred Stock may reasonably request, all to the extent required from time to
time to enable such Holder or beneficial Holder to sell its Notes or Common
Stock or Series B Preferred Stock without registration under the Securities Act
within the limitation of the exemption provided by Rule 144A, as such Rule may
be amended from time to time. Upon the request of any Holder or any beneficial
Holder of the Notes or such Common Stock or Series B Preferred Stock, the
Company will deliver to such Holder a written statement as to whether it has
complied with such requirements.

         Section 5.3.      Maintenance of Office or Agency.

         The Company will maintain in the United States an office or agency
(which may be the Corporate Trust Office) where the Notes may be surrendered
for registration of transfer or exchange or for presentation for payment or for
conversion or redemption and where notices and demands to or upon the Company
in respect of the Notes and this Indenture may be served. The Company will give
prompt written notice to the Trustee of the location, and any change in the
location, of such office or agency not designated or appointed by the Trustee.
If at any time the Company shall fail to maintain any such required office or
agency or shall fail to furnish the Trustee with the address thereof, such
presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office or the office or agency of the Trustee.

         The Company may also from time to time designate one or more other
offices or agencies where the Notes may be presented or surrendered for any or
all such purposes and may from time to time rescind such designations provided
that no such designation or rescission shall in any manner relieve the Company
of its obligation to maintain an office, for such purposes. The Company will
give prompt written notice to the Holders of any such designation or rescission
and of any change in the location of any such other office or agency.

         The Company hereby initially designates each of the Corporate Trust
Office of the Trustee and the office or agency of the Trustee in
_________________ as one such office or agency of the Company for each of the
aforesaid purposes.


                                      19
<PAGE>   85


         Section 5.4.      Stay, Extension and Usury Laws.

         The Company covenants (to the extent that it may lawfully do so) that
it shall not at any time insist upon, plead, or in any manner whatsoever claim
or take the benefit or advantage of, any stay, extension or usury law or other
law which would prohibit or forgive the Company from paying all or any portion
of the principal of or interest on the Notes as contemplated herein, wherever
enacted, now or at any time hereafter in force, or which may affect the
covenants or the performance of this Indenture, and the Company (to the extent
it may lawfully do so) hereby expressly waives all benefits or advantage of any
such law, and covenants that it will not, by resort to any such law, hinder,
delay or impede the execution of any power herein granted to the Trustee, but
will suffer and permit the execution of every such power as though no such law
has been enacted.

         Section 5.5.      Liquidation.

         The Board of Directors or the stockholders of the Company may not
adopt a plan of liquidation, which plan provides for, contemplates or the
effectuation of which is preceded by (a) the sale, lease, conveyance or other
disposition of all or substantially all of the assets of the Company otherwise
than substantially as an entirety (any such sale, lease, conveyance or other
disposition substantially as an entirety being governed by Article VII) and (b)
the distribution of all or substantially all of the proceeds of such sale,
lease, conveyance or other disposition and of the remaining assets of the
Company to the holders of the capital stock of the Company, unless the Company
shall in connection with the adoption of such plan make provision for, or agree
that prior to making any liquidating distributions it will make provision for,
the satisfaction of the Company's obligations hereunder and under the Notes as
to the payment of the principal and interest thereof. The Company shall be
deemed to make provision for such payments only if (1) the Company irrevocably
deposits in trust with the Trustee money or U.S. Government Obligations
maturing as to principal and interest in such amounts and at such times as are
sufficient, without consideration of any reinvestment of such interest, to pay
the principal of and interest on the Notes then outstanding to maturity and to
pay all other sums payable by it hereunder or (2) there is an express
assumption of the due and punctual payment of the Company's obligations
hereunder and under the Notes and the performance and observance of all
covenants and conditions to be performed by the Company hereunder, by the
execution and delivery of a supplemental indenture in form satisfactory to the
Trustee by a Person who acquires, or will acquire (otherwise than pursuant to a
lease), all or substantially all of the assets of the Company, and which Person
will have assets (immediately after the acquisition) and aggregate earnings
(for such Person's four full fiscal quarters immediately preceding such
acquisition) at least equal to the assets of the Company (immediately preceding
such acquisition) and the aggregate earnings of the Company (for its four (4)
full fiscal quarters immediately preceding the acquisition), respectively, and
which is a corporation organized under the laws of the United States, any State
thereof or the District of Columbia; provided, however, that the Company shall
not make any liquidating distribution until after the Company (x) has certified
to the Trustee with an Officers' Certificate at least five (5) days prior to
the making of any liquidating distribution that it has complied with the
provisions of this Section 5.5 and (y) delivered to the Trustee an Opinion of
Counsel that all conditions precedent to such liquidation have been complied
with.


                                      20
<PAGE>   86


         Section 5.6.      Compliance Certificates.

         The Company shall deliver to the Trustee, within 90 days after the end
of each fiscal year of the Company, an Officers' Certificate as to the signer's
knowledge of the Company's compliance with all conditions and covenants on its
part contained in this Indenture and stating whether or not the signer knows of
any default or Event of Default. If such signer knows of such a default or
Event of Default, the Officers' Certificate shall describe the default or Event
of Default and the efforts to remedy the same. For the purposes of this Section
5.6, compliance shall be determined without regard to any grace period or
requirement of notice provided pursuant to the terms of this Indenture. The
Officers' Certificate need not comply with Section 16.5 hereof.

         Section 5.7.      Corporate Existence.

         Subject to Article XII, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its corporate
existence and rights (charter and statutory); provided, however, that the
Company shall not be required to preserve any right if the Board of Directors
shall determine in good faith that the preservation is no longer desirable in
the conduct of the Company's business and that the loss thereof is not, and
will not be, adverse in any material respect to the Holders.

         Section 5.8.      Further Instruments and Acts.

         Upon request of the Trustee, the Company will execute and deliver such
further instruments and do such further acts as may be reasonably necessary or
proper to carry out more effectively the purposes of this Indenture.

         Section 5.9.      Certain Restrictions.

         (a)      So long as Notes having, collectively, an aggregate principal
amount equal to or greater than Twenty-Five Million Dollars ($25,000,000) shall
remain outstanding, the Company shall not, without first obtaining the consent
or approval of the Holders of a majority of the then outstanding Notes:

                  (i)      create, incur, issue, assume, guaranty or otherwise
become directly or indirectly liable, contingently or otherwise (collectively,
"incur"), with respect to any Indebtedness, other than (i) Indebtedness
represented by the Notes and any Indebtedness issued pursuant to the terms of
the Notes; (ii) Indebtedness existing as of the date of this Indenture and any
modifications, amendments or refinancing of such existing Indebtedness; (iii)
Indebtedness arising out of the secured financing or refinancing of the
Company's assets in the ordinary course of the Company's business; (iv)
additional Indebtedness incurred by the Company from time to time after the
original Issuance Date of the Notes in the ordinary course of its business
provided that such Indebtedness referred to in this clause (iv) does not at any
time exceed, in the aggregate, $50,000,000 at any time outstanding; and (v)
additional Indebtedness, if any, as agreed upon by the Company and the Holders
of a majority of the then outstanding Notes (all Indebtedness set forth in
subparagraphs (i), (ii), (iii) (iv) or (v) hereof being referred to herein as
"Permitted Indebtedness"). As used herein, "Indebtedness" means, without
duplication, all liabilities and obligations, contingent or otherwise, of the
Corporation, (i) in respect of borrowed money, (ii)


                                      21
<PAGE>   87


evidenced by bonds, notes, debentures or similar instruments, (iii) in respect
of Capitalized Lease Obligations (as defined herein), or (iv) evidenced by a
letter of credit or a reimbursement obligation of the Company with respect to
any letter of credit; but excluding obligations arising out of operating
leases, obligations (whether contingent or otherwise) existing as of the
original Issuance Date relating to the buyout of joint venture investors and
contingent liabilities incurred in the ordinary course of business.

                  (ii)     create, incur, assume or suffer to exist any
mortgage, lien, pledge, charge, security interest or other encumbrance of any
kind, whether or not filed, recorded or otherwise perfected under applicable
law (including any conditional sale or other title retention agreement, any
lease deemed to constitute a security interest and any option or other
agreement to give any security interest) (each, a "Lien") on any asset now
owned or hereafter acquired by the Company, or any income or profits therefrom
or assign or convey any right to receive income therefrom, except Permitted
Liens (as defined herein). As used herein, "Permitted Liens" shall mean (A)
Liens on property existing as of the date of this Indenture and as modified or
amended from time to time; (B) Liens to secure the performance of statutory
obligations, surety or appeal bonds, performance bonds or other obligations of
a like nature incurred in the ordinary course of business; (C) Liens for taxes,
assessments or governmental charges or claims that are not yet delinquent or
that are being contested in good faith by appropriate proceedings promptly
instituted and diligently concluded, provided, however, that any reserve or
other appropriate provision as shall be required in conformity with GAAP shall
have been made therefor; (D) Liens incurred or deposits made in the ordinary
course of business in connection with workers' compensation, unemployment
insurance and other types of social security; (E) easements, rights-of-way,
restrictions, minor defects or irregularities in title and other similar
charges or encumbrances not interfering in any material respect with the
business of the Corporation; (F) Liens securing reimbursement obligations with
respect to letters of credit which encumber only documents and other property
relating to such letters of credit and the products and proceeds thereof; (G)
Liens encumbering deposits made to secure obligations arising from statutory,
regulatory, contractual or warranty requirements; (H) any interest or title of
a lessor in property subject to any Capitalized Lease Obligation or operating
lease; (I) Liens evidenced by Uniform Commercial Code financing statements
regarding leases; (J) Liens in respect of property or assets imposed by law
which were incurred in the ordinary course of business, such as carrier's,
warehousemen's, materialmen's and mechanic's liens, which do not in the
aggregate materially detract from the value of such property or assets or
materially impair the use thereof; or (K) Liens securing Permitted
Indebtedness.

                                   ARTICLE VI

                         NOTEHOLDERS' LISTS AND REPORTS
                                 BY THE TRUSTEE

         Section 6.1.      Holders' Lists.

         The Company covenants and agrees that it will furnish or cause to be
furnished to the Trustee, semiannually, not more than 15 days after each March
15 and September 15 in each year beginning with September 15, 2000, and at such
other times as the Trustee may request in writing, within 30 days after receipt
by the Company of any such request (or such lesser time as


                                      22
<PAGE>   88


the Trustee may reasonably request in order to enable it to timely provide any
notice to be provided by it hereunder), a list in such form as the Trustee may
reasonably require of the names and addresses of the Holders of Notes as of a
date not more than 15 days (or such other date as the Trustee may reasonably
request in order to so provide any such notices) prior to the time such
information is furnished, except that no such list need be furnished so long as
the Trustee is acting as Registrar.

         Section 6.2.      Preservation and Disclosure of Lists.

         (a)      The Trustee shall preserve, in as current a form as is
reasonably practicable, all information as to the names and addresses of the
Holders of Notes contained in the most recent list furnished to it as provided
in Section 6.1 or maintained by the Trustee in its capacity as Registrar, if so
acting. The Trustee may destroy any list furnished to it as provided in Section
6.1 upon receipt of a new list so furnished.

         (b)      The rights of Holders to communicate with other Holders of
Notes with respect to their rights under this Indenture or under the Notes, and
the corresponding rights and duties of the Trustee, shall be as provided by the
Trust Indenture Act.

         (c)      Every Noteholder, by receiving and holding the same, agrees
with the Company and the Trustee that neither the Company nor the Trustee nor
any Agent of either of them shall be held accountable by reason of any
disclosure of information as to names and addresses of Holders of Notes made
pursuant to the Trust Indenture Act.

         Section 6.3.      Reports by Trustee.

         (a)      Within 60 days after December 31 of each year commencing with
the year 2000, the Trustee shall transmit to Holders of Notes such reports
dated as of December 31 of the year in which such reports are made concerning
the Trustee and its actions under this Indenture as may be required pursuant to
the Trust Indenture Act at the times and in the manner provided pursuant
thereto.

         (b)      A copy of such report shall, at the time of such transmission
to Holders of Notes, be filed by the Trustee with each stock exchange or
automated quotation system upon which the Notes may be listed or traded and
with the Company. The Company will notify the Trustee in writing within a
reasonable time if the Notes are listed on any stock exchange or automated
quotation system.

                                  ARTICLE VII
                    REMEDIES OF THE TRUSTEE AND NOTEHOLDERS
                             ON AN EVENT OF DEFAULT

         Section 7.1.      Events of Default.

         In case one or more of the following Events of Default (whatever the
reason for such Event of Default and whether it shall be voluntary or
involuntary or be effected by operation of law or pursuant to any judgment,
decree or order of any court or any order, rule or regulation of any
administrative or governmental body) shall have occurred and be continuing:


                                      23
<PAGE>   89

         (a)      default in the payment of any installment of interest upon
any of the Notes as and when the same shall become due and payable, and
continuance of such default for a period of 30 days;

         (b)      default in the payment of the principal of the Notes as and
when the same shall become due and payable either at maturity or in connection
with any redemption pursuant to Article III, by acceleration or otherwise;

         (c)      failure on the part of the Company duly to observe or perform
any other of the covenants or agreements on the part of the Company in the
Notes or in this Indenture (other than a covenant or agreement a default in
whose performance or whose breach is elsewhere in this Section 7.1 specifically
dealt with) which failure has continued for a period of 60 days after the date
on which written notice of such failure, requiring the Company to remedy the
same, shall have been given to the Company by the Trustee, or to the Company
and a Trust Officer of the Trustee by the Holders of at least 50% in aggregate
principal amount of the Notes at the time outstanding determined in accordance
with Section 9.4;

         (d)      default by the Company in payment of an amount of in excess
of $10,000,000 of Indebtedness for borrowed money or acceleration of any
Indebtedness for borrowed money in an amount in excess of $10,000,000;

         (e)      the failure of any of the representations and warranties of
the Company set forth in the Purchase Agreement between the Company and ______,
______ dated April ___, 2000 (the "Purchase Agreement") to be true and correct
in all material respects as of the April ___, 2000 and the date hereof or the
failure of the Company to have complied in all material respects with each of
the Company's covenants set forth in the Purchase Agreement as of April ___,
2000 and as of the date hereof;

         (f)      the Company shall commence a voluntary case or other
proceeding seeking liquidation, reorganization or other relief with respect to
itself or its debts under any bankruptcy, insolvency or other similar law now
or hereafter in effect or seeking the appointment of a trustee, receiver,
liquidator, custodian or other similar official of it or any substantial part
of its property, or shall consent to any such relief or to the appointment of
or taking possession by any such official in an involuntary case or other
proceeding commenced against it, or shall make a general assignment for the
benefit of creditors, or shall fail generally to pay its debts as they become
due; or

         (g)      an involuntary case or other proceeding shall be commenced
against the Company seeking liquidation, reorganization or other relief with
respect to it or its debts under any bankruptcy, insolvency or other similar
law now or hereafter in effect or seeking the appointment of a trustee,
receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, and such involuntary case or other proceeding
shall remain undismissed and unstayed for a period of 60 consecutive days.

then, and in each and every such case (other than an Event of Default specified
in Section 7.1(f) or (g)), unless the principal of all of the Notes shall have
already become due and payable, either the Trustee or the Holders of not less
than 50% in aggregate principal amount of the Notes then


                                      24
<PAGE>   90


outstanding hereunder determined in accordance with Section 9.4, by notice in
writing to the Company (and to the Trustee if given by Holders), may declare
the principal of all the Notes and the interest accrued thereon to be due and
payable immediately, and upon any such declaration the same shall become and
shall be immediately due and payable, anything in this Indenture or in the
Notes contained to the contrary notwithstanding. If an Event of Default
specified in Section 7.1(f) or (g) occurs, the principal of all the Notes and
the interest accrued thereon shall be immediately and automatically due and
payable without necessity of further action. This provision, however, is
subject to the condition that if, at any time after the decree for the payment
of the monies due shall have been obtained or entered as hereinafter provided,
the Company shall pay or shall deposit with the Trustee a sum sufficient to pay
all matured installments of interest upon all Notes and the principal of any
and all Notes which shall have become due otherwise than by acceleration (with
interest on overdue installments of interest (to the extent that payment of
such interest is enforceable under applicable law) and on such principal at the
rate borne by the Notes, to the date of such payment or deposit) and amounts
due to the Trustee pursuant to Section 8.6, and if any and all defaults under
this Indenture, other than the nonpayment of principal and accrued interest on
Notes which shall have become due by acceleration, shall have been cured or
waived pursuant to Section 7.7, then and in every such case the Holders of a
majority in aggregate principal amount of the Notes then outstanding determined
in accordance with Section 9.4, by written notice to the Company and to the
Trustee, may waive all defaults or Events of Default and rescind and annul such
declaration and its consequences, but no such waiver or rescission and
annulment shall extend to or shall affect any subsequent default or Event of
Default, or shall impair any right consequent thereon. The Company shall notify
a Trust Officer in writing, promptly upon becoming aware thereof, of any
default or Event of Default.

         In case the Trustee shall have proceeded to enforce any right under
this Indenture and such proceedings shall have been discontinued or abandoned
because of such waiver or rescission and annulment or for any other reason or
shall have been determined adversely to the Trustee, then and in every such
case the Company, the Holders of Notes, and the Trustee shall be restored
respectively to their several positions and rights hereunder and all rights,
remedies and powers of the Company, the Holders of Notes, and the Trustee shall
continue as though no such proceeding had been taken.

         Section 7.2.      Payment of Notes on Default; Suit Therefor.

         The Company covenants that (a) in case default shall be made in the
payment of any installment of interest upon any of the Notes as and when the
same shall become due and payable, and such default shall have continued for a
period of 30 days, or (b) in case default shall be made in the payment of the
principal of the Notes as and when the same shall have become due and payable,
whether at maturity of the Notes or in connection with any redemption under
this Indenture, by declaration or otherwise, then, upon demand of the Trustee,
the Company will pay to the Trustee, for the benefit of the Holders, the whole
amount that then shall have become due and payable on all such Notes for
principal or interest, or both, as the case may be, with interest upon the
overdue principal, if any, and (to the extent that payment of such interest is
enforceable under applicable law) upon the overdue installments of interest at
the rate borne by the Notes and, in addition thereto, such further amount as
shall be sufficient to cover the costs and expenses of collection, including
reasonable compensation to the Trustee, its agents,


                                      25
<PAGE>   91


attorneys and counsel, and any expenses or liabilities incurred by the Trustee
hereunder. Until such demand by the Trustee, the Company may pay the principal
and interest on the Notes to the Holders, whether or not the Notes are overdue.

         In case the Company shall fail forthwith to pay such amounts upon such
demand, the Trustee, in its own name and as Trustee of an express trust, shall
be entitled and empowered to institute any actions or proceedings at law or in
equity for the collection of the sums so due and unpaid, and may prosecute any
such action or proceeding to judgment or final decree, and may enforce any such
judgment or final decree against the Company or any other obligor on the Notes
and collect in the manner provided by law out of the property of the Company or
any other obligor on the Notes wherever situated the monies adjudged or decreed
to be payable.

         In the case there shall be pending proceedings for the bankruptcy or
for the reorganization of the Company or any other obligor on the Notes under
Title 11 of the United States Code, or any other applicable law, or in case a
receiver, assignee or trustee in bankruptcy or reorganization, liquidator,
sequestrator or similar official shall have been appointed for or taken
possession of the Company or such other obligor, the property of the Company or
such other obligor, or in the case of any other judicial proceedings relative
to the Company or such other obligor upon the Notes, or to the creditors or
property of the Company or such other obligor, the Trustee, irrespective of
whether the principal of the Notes shall then be due and payable as therein
expressed or by declaration or otherwise and irrespective of whether the
Trustee shall have made any demand pursuant to the provisions of this Section
7.2, shall be entitled and empowered, by intervention in such proceedings or
otherwise, to file and prove a claim or claims for the whole amount of
principal and interest owing and unpaid in respect of the Notes, and, in case
of any judicial proceedings, to file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee and of the Holders allowed in such judicial proceedings relative to the
Company or any other obligor on the Notes, its or their creditors, or its or
their property, and to collect and receive any monies or other property payable
or deliverable on any such claims, and to distribute the same after the
deduction of any amounts due the Trustee under Section 8.6, and any receiver,
assignee or trustee in bankruptcy or reorganization, liquidator, custodian or
similar official is hereby authorized by each of the Holders to make such
payments to the Trustee, and, in the event that the Trustee shall consent to
the making of such payments directly to the Holders, to pay to the Trustee any
amount due it for reasonable compensation, expenses, advances and
disbursements, including counsel fees incurred by it up to the date of such
distribution. To the extent that such payment of reasonable compensation,
expenses, advances and disbursements out of the estate in any such proceedings
shall be denied for any reason, payment of the same shall be secured by a lien
on, and shall be paid out of, any and all distributions, dividends, monies,
securities and other property which the Holders may be entitled to receive in
such proceedings, whether in liquidation or under any plan of reorganization or
arrangement or otherwise.

         All rights of action and of asserting claims under this Indenture, or
under any of the Notes, may be enforced by the Trustee without the possession
of any of the Notes, or the production thereof at any trial or other proceeding
relative thereto, and any such suit or proceeding instituted by the Trustee
shall be brought in its own name as trustee of an express trust, and any
recovery of judgment shall, after provision for the payment of the reasonable


                                      26
<PAGE>   92


compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, be for the ratable benefit of the Holders.

         In any proceedings brought by the Trustee (and in any proceedings
involving the interpretation of any provision of this Indenture to which the
Trustee shall be a party), the Trustee shall be held to represent all the
Holders, and it shall not be necessary to make any Holders parties to any such
proceedings.

         Section 7.3.      Application of Monies Collected by Trustee.

         Any monies collected by the Trustee pursuant to this Article VII shall
be applied in the order following, at the date or dates fixed by the Trustee
for the distribution of such monies, upon presentation of the several Notes,
and stamping thereon the payment, if only partially paid, and upon surrender
thereof, if fully paid:

         First: to the payment of all amounts due the Trustee under Section
8.6;

         Second: in case the principal of the outstanding Notes shall not have
become due and be unpaid, to the payment of interest on the Notes in default in
the order of the maturity of the installments of such interest, with interest
(to the extent that such interest has been collected by the Trustee) upon the
overdue installments of interest at the rate borne by the Notes, such payments
to be made ratably to the Persons entitled thereto;

         Third: in case the principal of the outstanding Notes shall have
become due, by acceleration or otherwise, and be unpaid, to the payment of the
whole amount then owing and unpaid upon the Notes for principal and interest,
with interest on the overdue principal and (to the extent that such interest
has been collected by the Trustee) upon overdue payments of interest at the
rate borne by the Notes, and in case such monies shall be insufficient to pay
in full the whole amounts so due and unpaid upon the Notes, then to the payment
of such principal and interest without preference or priority of principal,
over interest, or of interest over principal or of any installment of interest
over any other installment of interest, or of any Note over any other Note,
ratably to the aggregate of such principal and accrued and unpaid interest; and

         Fourth: to the payment of the remainder, if any, to the Company or any
other Person lawfully entitled thereto.

         Section 7.4.      Proceedings by Holders.

         No Holder shall have any right by virtue of or by availing itself of
any provision of this Indenture to institute any suit, action or proceeding in
equity or at law upon or under or with respect to this Indenture, or for the
appointment of a receiver, trustee, liquidator, custodian or other similar
official, or for any other remedy hereunder, unless such Holder previously
shall have given to the Trustee written notice of an Event of Default and of
the continuance thereof, as hereinbefore provided, and unless also the Holders
of not less than 50% in aggregate principal amount of the Notes then
outstanding determined in accordance with Section 9.4 shall have made written
request upon the Trustee to institute such action, suit or proceedings in its
own name as Trustee hereunder and shall have offered to the Trustee such
reasonable indemnity as it may require against the costs, expenses and
liabilities to be incurred therein or thereby, and the


                                      27
<PAGE>   93


Trustee for 60 days after its receipt of such notice, request and offer of
indemnity, shall have neglected or refused to institute any such action, suit
or proceeding and no direction inconsistent with such written request shall
have been given to the Trustee pursuant to Section 7.7, it being understood and
intended, and being expressly covenanted by the taker and Holder of every Note
with every other taker and Holder and the Trustee, that no one or more Holders
shall have any right in any manner whatever by virtue of or by availing itself
of any provision of this Indenture to affect, disturb or prejudice the rights
of any other Holder of Notes, or to obtain or seek to obtain priority over or
preference to any other such Holder, or to enforce any right under this
Indenture, except in the manner herein provided and for the equal, ratable and
common benefit of all Holders (except as otherwise provided herein). For the
protection and enforcement of this Section 7.4, each and every Noteholder and
the Trustee shall be entitled to such relief as can be given either at law or
in equity.

         Notwithstanding any other provision of this Indenture and any
provision of any Note, the right of any Holder of any Note to receive payment
of the principal of and interest on such Note, on or after the respective due
dates therefor, or to institute suit for the enforcement of any such payment on
or after such respective dates against the Company shall not be impaired or
affected without the consent of such Holder.

         Anything in this Indenture or the Notes to the contrary
notwithstanding, the Holder of any Note, without the consent of either the
Trustee or the Holder of any other Note, in his own behalf and for his own
benefit, may enforce, and may institute and maintain any proceeding suitable to
enforce, his rights of conversion as provided herein.

         Section 7.5.      Proceedings by Trustee.

         In case of an Event of Default, the Trustee may in its discretion
proceed to protect and enforce the rights vested in it by this Indenture by
such appropriate judicial proceedings as the Trustee shall deem most effectual
to protect and enforce any of such rights, either by suit in equity or by
action at law or by proceeding in bankruptcy or otherwise, whether for the
specific enforcement of any covenant or agreement contained in this Indenture
or in aid of the exercise of any power granted in this Indenture, or to enforce
any other legal or equitable right vested in the Trustee by this Indenture or
by law.

         Section 7.6.      Remedies Cumulative and Continuing.

         Except as otherwise expressly provided herein, all powers and remedies
given by this Article VII to the Trustee or to the Holders shall, to the extent
permitted by law, be deemed cumulative and not exclusive of any thereof or of
any other powers and remedies available to the Trustee or the Holders, by
judicial proceedings or otherwise, to enforce the performance or observance of
the covenants and agreements contained in this Indenture, and no delay or
omission of the Trustee or of any Holder of any of the Notes to exercise any
right or power accruing upon any default or Event of Default occurring and
continuing as aforesaid shall impair any such right or power, or shall be
construed to be a waiver of any such default or any acquiescence therein and,
subject to the provisions of Section 7.4, every power and remedy given by this
Article VII or by law to the Trustee or to the Holders may be exercised from
time to time, and as often as shall be deemed expedient, by the Trustee or by
the Holders.


                                      28
<PAGE>   94


         Section 7.7.      Direction of Proceedings and Waiver of Defaults by
                           Majority of Holders.

         The Holders of a majority in aggregate principal amount of the Notes
at the time outstanding determined in accordance with Section 9.4 shall have
the right to direct the time, method and place of conducting any proceeding for
any remedy available to the Trustee or exercising any trust or power conferred
on the Trustee, provided, however, that (a) such direction shall not be in
conflict with any rule of law or with this Indenture, and (b) the Trustee may
take any other action deemed proper by the Trustee which is not inconsistent
with such direction. The Holders of a majority in aggregate principal amount of
the Notes at the time outstanding determined in accordance with Section 9.4 may
on behalf of the Holders of all of the Notes waive any past default or Event of
Default hereunder and its consequences except (i) a default in the payment of
interest on, or the principal of, the Notes, (ii) a failure by the Company to
convert any Notes into Common Stock or Series B Preferred Stock, as applicable,
pursuant to Article XV, (iii) a default in the payment of the Redemption Price
pursuant to Article III or (iv) a default in respect of a covenant or
provisions hereof which under Article XI cannot be modified or amended without
the consent of the Holders of all Notes then outstanding. Upon any such waiver,
the Company, the Trustee and the Holders shall be restored to their former
positions and rights hereunder, but no such waiver shall extend to any
subsequent or other default or Event of Default or impair any right consequent
thereon. Whenever any default or Event of Default hereunder shall have been
waived as permitted by this Section 7.7, said default or Event of Default shall
for all purposes of the Notes and this Indenture be deemed to have been cured
and to be not continuing, but no such waiver shall extend to any subsequent or
other default or Event of Default or impair any right consequent thereon.

         Section 7.8.      Notice of Defaults.

         The Trustee shall, within 90 days after a Trust Officer has knowledge
of the occurrence of a default, mail to all Holders, as the names and addresses
of such Holders appear upon the Note register, notice of all defaults known to
a Trust Officer, unless such defaults shall have been cured or waived before
the giving of such notice and provided that, except in the case of default in
the payment of the principal of, or interest on any of the Notes, the Trustee
shall be protected in withholding such notice if and so long as a trust
committee of directors and/or officers of the Trustee in good faith determines
that the withholding of such notice is in the interest of the Holders.

         Section 7.9.      Undertaking to Pay Costs.

         All parties to this Indenture agree, and each Holder of any Note by
his acceptance thereof shall be deemed to have agreed, that any court may, in
its discretion, require, in any suit for the enforcement of any right or remedy
under this Indenture, or in any suit against the Trustee for any action taken
or omitted by it as Trustee, the filing by any party litigant in such suit of
an undertaking to pay the costs of such suit and that such court may in its
discretion assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in such suit, having due regard to the merits and
good faith of the claims or defenses made by such party litigant, provided that
the provisions of this Section 7.9 (to the extent permitted by law) shall not
apply to any suit instituted by the Trustee, to any suit instituted by any
Noteholder, or group of Holders, holding in the aggregate more than ten percent
in principal amount of the Notes at the


                                      29
<PAGE>   95


time outstanding determined in accordance with Section 9.4, or to any suit
instituted by any Noteholder for the enforcement of the payment of the
principal of or interest on any Note on or after the due date therefor or to
any suit for the enforcement of the right to convert any Note in accordance
with the provisions of Article XV.

                                  ARTICLE VIII
                             CONCERNING THE TRUSTEE

         Section 8.1.      Duties and Responsibilities of Trustee.

         The Trustee, prior to the occurrence of an Event of Default and after
the curing of all Events of Default which may have occurred, undertakes to
perform such duties and only such duties as are specifically set forth in this
Indenture. In case an Event of Default has occurred (which has not been cured
or waived), the Trustee shall exercise such of the rights and powers vested in
it by this Indenture, and use the same degree of care and skill in their
exercise, as a prudent man would exercise or use under the circumstances in the
conduct of his own affairs.

         No provision of this Indenture shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure
to act or its own willful misconduct, except that:

         (a)      prior to the occurrence of an Event of Default and after the
curing or waiving of all Events of Default which may have occurred:

         (1)      the duties and obligations of the Trustee shall be determined
solely by the express provisions of this Indenture and the Trust Indenture Act,
and the Trustee shall not be liable except for the performance of such duties
and obligations as are specifically set forth in this Indenture and no implied
covenants or obligations shall be read into this Indenture or the Trust
Indenture Act against the Trustee; and

         (2)      in the absence of bad faith and willful misconduct on the
part of the Trustee, the Trustee may conclusively rely, as to the truth of the
statements and the correctness of the opinions expressed therein, upon any
certificates or opinions furnished to the Trustee and conforming to the
requirements of this Indenture but, in the case of any such certificates or
opinions which by any provisions hereof are specifically required to be
furnished to the Trustee, the Trustee shall be under a duty to examine the same
to determine whether or not they conform to the requirements of this Indenture;

         (b)      the Trustee shall not be liable for any error of judgment
made in good faith by a Trust Officer or Officers, unless the Trustee was
negligent in ascertaining the pertinent facts;

         (c)      the Trustee shall not be liable with respect to any action
taken or omitted to be taken by it in good faith in accordance with the
direction of the Holders of not less than a majority in principal amount of the
Notes at the time outstanding determined as provided in Section 9.4 relating to
the time, method and place of conducting any proceeding for any remedy
available to the Trustee, or exercising any trust or power conferred upon the
Trustee, under this Indenture; and


                                      30
<PAGE>   96


         (d)      whether or not therein provided, every provision of this
Indenture relating to the conduct or affecting the liability of, or affording
protection to, the Trustee as Trustee, Paying Agent, Registrar, Custodian or
Conversion Agent shall be subject to the provisions of this Section.

         None of the provisions contained in this Indenture shall require the
Trustee to expend or risk its own funds or otherwise incur personal financial
liability in the performance of any of its duties or in the exercise of any of
its rights or powers.

         Section 8.2.      Reliance on Documents, Opinions, Etc.

         (a)      the Trustee may rely and shall be protected in acting upon
any resolution, certificate, statement, instrument, opinion, report, notice,
request, consent, order, bond, note, coupon or other paper or document believed
by it in good faith to be genuine and to have been signed or presented by the
proper party or parties;

         (b)      any request, direction, order or demand of the Company
mentioned herein shall be sufficiently evidenced by an Officers' Certificate
(unless other evidence in respect thereof be herein specifically prescribed)
and any resolution of the Board of Directors may be evidence to the Trustee by
a copy thereof certified by the Secretary or an Assistant Secretary of the
Company;

         (c)      the Trustee may consult with counsel, and any advice or
Opinion of Counsel shall be full and complete authorization and protection in
respect of any action taken or omitted by it thereunder in good faith and in
accordance with such advice or Opinion of Counsel;

         (d)      the Trustee shall be under no obligation to exercise any of
the rights or powers vested in it by this Indenture at the request, order or
direction of any of the Holders pursuant to the provisions of this Indenture,
unless such Holders shall have offered to the Trustee reasonable security or
indemnity against the costs, expenses and liabilities which may be incurred
therein or thereby;

         (e)      the Trustee shall not be bound to make any investigation into
the facts or matters stated in any resolution, certificate, statement,
instrument, opinion, report, notice, request, direction, consent, order, bond,
Note or other paper or document, but the Trustee, in its discretion, may make
such further inquiry or investigation into such facts or matters as it may see
fit, and, if the Trustee shall determine to make such further inquiry or
investigation, it shall be entitled to examine the books, records and premises
of the Company, personally or by Agent or attorney, provided, however, that if
the payments within a reasonable time to the Trustee of the costs, expenses or
liabilities likely to be incurred by it in the making of such investigation is,
in the opinion of the Trustee, not reasonably assured to the Trustee by the
security afforded to it by the terms of this Indenture, the Trustee may require
reasonable indemnity against such expenses or liability as a condition to so
proceeding and the reasonable expenses of every such examination shall be paid
by the Company or, if paid by the Trustee or any predecessor Trustee, shall be
repaid by the Company upon demand;

         (f)      the Trustee may execute any of the trusts or powers hereunder
or perform any duties hereunder either directly or by or through agents or
attorneys and the Trustee shall not be


                                      31
<PAGE>   97


responsible for any misconduct or negligence on the part of any Agent or
attorney appointed by it with due care hereunder; and

         (g)      the Trustee shall not be deemed to have notice of an Event of
Default or of any event or conditions which, with the giving of notice, the
passage of time, or both, might constitute an Event of Default unless (i) the
Trustee has received written notice thereof from the Company or any Noteholder
or (ii) a Trust Officer shall have actual knowledge thereof.

         Section 8.3.      No Responsibility for Recitals, Etc.

         The recitals contained herein and in the Notes (except in the
Trustee's certificate of authentication) shall be taken as the statements of
the Company, and the Trustee assumes no responsibility for the correctness of
the same. The Trustee makes no representations as to the validity or
sufficiency of this Indenture or of the Notes. The Trustee shall not be
accountable for the use or application by the Company of any Notes or the
proceeds of any Notes authenticated and delivered by the Trustee in conformity
with the provisions of this Indenture.

         Section 8.4.      Trustee, Paying Agents, Conversion Agents or
                           Registrar May Own Notes.

         The Trustee, any Paying Agent, any Conversion Agent or Registrar, in
its individual or any other capacity, may become the owner or pledgee of Notes
with the same rights it would have if it were not Trustee, Paying Agent,
Conversion Agent or Registrar.

         Section 8.5.      Monies to Be Held in Trust.

         Subject to the provisions of Section 13.4, all monies received by the
Trustee shall, until used or applied as herein provided, be held in trust for
the purposes for which they were received. Money held by the Trustee in trust
thereunder need not be segregated from other funds except to the extent
required by law. The Trustee shall be under no liability for interest on any
money received by it hereunder except as may be agreed from time to time by the
Company and the Trustee.

         Section 8.6.      Compensation and Expenses of Trustee.

         The Company covenants and agrees to pay to the Trustee from time to
time, and the Trustee shall be entitled to, reasonable compensation for all
services rendered by it hereunder in any capacity (which shall not be limited
by any provision of law in regard to the compensation of a Trustee of an
express trust), and the Company will pay or reimburse the Trustee upon its
request for all reasonable expenses, disbursements and advances reasonably
incurred or made by the Trustee in accordance with any of the provisions of
this Indenture (including the reasonable compensation and the expenses and
disbursements of its counsel and of all Persons not regularly in its employ),
except any such expense, disbursement or advance as may arise from the
Trustee's negligence, willful misconduct, recklessness or bad faith. The
Company also covenants to indemnify the Trustee in any capacity under this
Indenture and its agents and any authenticating agent for, and to hold them
harmless against, any loss, liability or expense incurred without negligence,
willful misconduct, recklessness, or bad faith on the part of the Trustee or
such Agent or authenticating agent, as the case may be, and arising out of or
in connection with the acceptance or administration of this trust or in any
other capacity hereunder,


                                      32
<PAGE>   98


including the costs and expenses of defending themselves against any claim of
liability in the premises. All indemnifications and releases from liability
granted hereunder to the Trustee shall extend to its Officers, directors,
employees, agents, successors and assigns. The obligations of the Company under
this Section 8.6 to compensate or indemnify the Trustee and to pay or reimburse
the Trustee for expenses, disbursements and advances shall be secured by a lien
prior to that of the Notes upon all property and funds held or collected by the
Trustee as such, except funds held in trust for the benefit of the Holders of
particular Notes. The obligation of the Company under this Section 8.6 shall
survive the satisfaction and discharge of this Indenture.

         When the Trustee and its agents and any authenticating agent incur
expenses or render services after an Event of Default specified in Section
7.1(e) or (f) occurs, the expenses and the compensation for the services are
intended to constitute expenses of administration under any bankruptcy,
insolvency or similar laws.

         Section 8.7.      Officers' Certificate as Evidence.

         Except as otherwise provided in Section 8.1, wherever in the
administration of the provisions of this Indenture, the Trustee shall deem it
necessary or desirable that a matter be proved or established prior to taking
or omitting any action hereunder, such matter (unless other evidence in respect
thereof be herein specifically prescribed) may, in the absence of negligence,
willful misconduct, recklessness, or bad faith on the part of the Trustee, be
deemed to be conclusively proved and established by an Officers' Certificate
delivered to the Trustee.

         Section 8.8.      Conflicting Interests of Trustee.

         If the Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Trustee shall either eliminate such
interest or resign, to the extent and in the manner provided by, and subject to
the provisions of, the Trust Indenture Act and this Indenture.

         Section 8.9.      Eligibility of Trustee.

         There shall at all times be a Trustee hereunder which shall be a
Person that is eligible pursuant to the Trust Indenture Act to act as such and
which shall have (or, in the case of a corporation included in a bank holding
company system, the related bank holding company shall have) a combined capital
and surplus of at least $50,000,000. If such Person publishes reports of
condition at least annually, pursuant to law or to the requirements of any
supervising or examining authority, then for the purposes of this Section 8.9,
the combined capital and surplus of such Person shall be deemed to be its
combined capital and surplus as set forth in its most recent report of
condition so published. If at any time the Trustee shall cease to be eligible
in accordance with the provisions of this Section 8.9, it shall resign
immediately in the manner and with the effect hereinafter specified in this
Article VIII.

         Section 8.10.     Resignation or Removal of Trustee.

         (a)      The Trustee may at any time resign by giving written notice
of such resignation to the Company and to the Holders of Notes. Upon receiving
such notice of resignation, the Company shall promptly appoint a successor
Trustee by written instrument, in duplicate, executed by order of the Board of
Directors, one copy of which instrument shall be delivered to


                                      33
<PAGE>   99


the resigning Trustee and one copy to the successor Trustee. If no successor
Trustee shall have been so appointed and have accepted appointment within 60
days after the mailing of such notice of resignation to the Holders, the
resigning Trustee may petition any court of competent jurisdiction for the
appointment of a successor Trustee, or any Noteholder who has been a bona fide
Holder of a Note or Notes for at least six months may, subject to the
provisions of Section 7.9, on behalf of himself and all others similarly
situated, petition any such court for the appointment of a successor Trustee.
Such court may thereupon, after such notice, if any, as it may deem proper and
prescribe, appoint a successor Trustee.

         (b)      In case at any time any of the following shall occur:

                  (1)      the Trustee shall fail to comply with Section 8.8
after written request therefor by the Company or by any Noteholder who has been
a bona fide Holder of a Note or Notes for at least six (6) months; or

                  (2)      the Trustee shall cease to be eligible in accordance
with the provisions of Section 8.9 and shall fail to resign after written
request therefor by the Company or by any such Noteholder; or

                  (3)      the Trustee shall become incapable of acting, or
shall be adjudged a bankrupt or insolvent, or a receiver of the Trustee or of
its property shall be appointed, or any public officer shall take charge or
control of the Trustee or of its property or affairs for the purpose of
rehabilitation, conservation or liquidation;

then, in any such case, the Company may remove the Trustee and appoint a
successor Trustee by written instrument, in duplicate, executed by order of the
Board of Directors, one copy of which instrument shall be delivered to the
Trustee so removed and one copy to the successor Trustee, or, subject to the
provisions of Section 7.9, any Noteholder who has been a bona fide Holder of a
Note or Notes for at least six (6) months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
removal of the Trustee and the appointment of a successor Trustee. Such court
may thereupon, after such notice, if any, as it may deem proper and prescribe,
remove the Trustee and appoint a successor Trustee.

         (c)      The Holders of a majority in aggregate principal amount of
the Notes at the time outstanding may at any time remove the Trustee and
nominate a successor Trustee which shall be deemed appointed as successor
Trustee unless within ten (10) days after notice to the Company of such
nomination, the Company objects thereto, in which case the Trustee so removed
or any Noteholder, upon the terms and conditions and otherwise as in Section
8.10(a) provided, may petition any court of competent jurisdiction for an
appointment of a successor Trustee.

         (d)      Any resignation or removal of the Trustee and appointment of
a successor Trustee pursuant to any of the provisions of this Section 8.10
shall become effective upon acceptance of appointment by the successor Trustee
as provided in Section 8.11.


                                      34
<PAGE>   100


         Section 8.11.     Acceptance by Successor Trustee.

         Any successor Trustee appointed as provided in Section 8.10 shall
execute, acknowledge and deliver to the Company and to its predecessor Trustee
an instrument accepting such appointment hereunder, and thereupon the
resignation or removal of the predecessor Trustee shall become effective and
such successor Trustee, without any further act, deed or conveyance, shall
become vested with all the rights, powers, duties and obligations of its
predecessor hereunder, with like effect as if originally named as Trustee
herein but, nevertheless, on the written request of the Company or of its
successor Trustee, the Trustee ceasing to act shall, upon payment of any
amounts then due it pursuant to the provisions of Section 8.6, execute and
deliver an instrument transferring to such successor Trustee all the rights and
powers of the Trustee so ceasing to act. Upon request of any such successor
Trustee, the Company shall execute any and all instruments in writing for more
fully and certainly vesting in and confirming to such successor Trustee all
such rights and powers. Any Trustee ceasing to act shall, nevertheless, retain
a lien upon all property and funds held or collected by such Trustee as such,
except for funds held in trust for the benefit of Holders of particular Notes,
to secure any amounts then due it pursuant to the provisions of Section 8.6.

         No successor Trustee shall accept appointment as provided in this
Section 8.11 unless at the time of such acceptance, such successor Trustee
shall be qualified under the provisions of Section 8.8 and be eligible under
the provisions of Section 8.9.

         Upon acceptance of appointment by a successor Trustee as provided in
this Section 8.11, the Company (or the former Trustee, at the written direction
of the Company) shall mail or cause to be mailed notice of the succession of
such Trustee hereunder the Holders of Notes at their addresses as they shall
appear on the Note register. If the Company fails to mail such notice within
ten (10) days after acceptance of appointment by the successor Trustee, the
successor Trustee shall cause such notice to be mailed at the expense of the
Company.

         Section 8.12.     Succession by Merger, Etc.

         Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated, or any corporation resulting from any
merger, conversion or consolidation to which the Trustee shall be a party, or
any corporation succeeding to all or substantially all of the corporate trust
business of the Trustee (including any trust created by this Indenture), shall
be the successor to the Trustee hereunder without the execution or filing of
any paper or any further act on the part of any of the parties hereto, provided
that in the case of any corporation succeeding to all or substantially all of
the corporate trust business of the Trustee, such corporation shall be
qualified under the provisions of Section 8.8 and eligible under the provisions
of Section 8.9.

         In case at the time such successor to the Trustee shall succeed to the
trusts created by this Indenture, any of the Notes shall have been
authenticated but not delivered, any such successor to the Trustee may adopt
the certificate of authentication of any predecessor Trustee or authenticating
agent appointed by such predecessor Trustee, and deliver such Notes so
authenticated and in case at that time any of the Notes shall not have been
authenticated, any successor to the Trustee or an authenticating agent
appointed by such successor Trustee may


                                      35
<PAGE>   101


authenticate such Notes either in the name of any predecessor Trustee hereunder
or in the name of the successor Trustee and in all such cases such certificates
shall have the full force which it is anywhere in the Notes or in this
Indenture provided that the certificate of the Trustee shall have provided,
however, that the right to adopt the certificate of authentication of any
predecessor Trustee shall apply only to its successor or successors by merger,
conversion or consolidation.

         Section 8.13.     Limitation on Rights of Trustee as Creditor.

         If and when the Trustee shall be or become a creditor of the Company
(or any other obligor upon the Notes), the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of the claims
against the Company (or any such other obligor).

                                   ARTICLE IX
                           CONCERNING THE NOTEHOLDERS

         Section 9.1.      Action by Holders.

         When in this Indenture it is provided that the Holders of a specified
percentage in aggregate principal amount of the Notes may take any action
(including the making of any demand or request, the giving of any notice,
consent or waiver or the taking of any other action), the fact that at the time
of taking any such action, the Holders of such specified percentage have joined
therein may be evidenced (a) by any instrument or any number of instruments of
similar tenor executed by Holders in Person or by Agent or proxy appointed in
writing, or (b) by the record of the Holders of Notes voting in favor thereof
at any meeting of Holders duly called and held in accordance with the
provisions of Article X, or (c) by a combination of such instrument or
instruments and any such record of such a meeting of Holders. Whenever the
Company or the Trustee solicits the taking of any action by the Holders, the
Company or the Trustee may fix in advance of such solicitation, a date as the
record date for determining Holders entitled to take such action. The record
date shall be not more than 15 days prior to the date of commencement of
solicitation of such action.

         Section 9.2.      Proof of Execution by Holders.

         Subject to the provisions of Sections 8.1, 8.2 and 10.5, proof of the
execution of any instrument by a Noteholder or his Agent or proxy shall be
sufficient if made in accordance with such reasonable rules and regulations as
may be prescribed by the Trustee or in such manner as shall be satisfactory to
the Trustee. The proof of holding of Notes shall be provided by the registry of
such Notes or by a certificate of the Registrar.

         The record of any Holders' meeting shall be proved in the manner
provided in Section 10.6.

         Section 9.3.      Who are Deemed Absolute Owners.

         The Company, any other obligor on the Notes, the Trustee, any
authenticating agent, any Paying Agent, any Conversion Agent and any Registrar
may deem the Person in whose name such Note shall be registered upon the Note
register to be, and may treat him as, the absolute owner of such Note (whether
or not such Note shall be overdue and notwithstanding any notation


                                      36
<PAGE>   102


of ownership or other writing thereon) for the purpose of receiving payment of
or on account of the principal of and interest on such Note, for conversion of
such Note and for all other purposes and neither the Company nor any
authenticating agent nor any Registrar shall be affected by any notice to the
contrary. All such payments so made to any Holder for the time being, or upon
his order, shall be valid, and, to the extent of the sum or sums so paid,
effectual to satisfy and discharge the liability for monies payable upon such
Note.

         Section 9.4.      Company-Owned Notes Disregarded.

         In determining whether the Holders of the requisite aggregate principal
amount of Notes have concurred in any direction, consent, waiver or other action
under this Indenture, Notes which are owned by the Company or any other obligor
on the Notes or, to the extent required by the TIA, by any Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with the Company or any other obligor on the Notes shall be disregarded
and deemed not to be outstanding for the purpose of any such determination,
provided that for the purposes of determining whether the Trustee shall be
protected in relying on any such direction, consent, waiver or other action,
only Notes which a Trust Officer knows are so owned shall be so disregarded.
Notes so owned which have been pledged in good faith may be regarded as
outstanding for the purpose of this Section 9.4 if the pledgee shall establish
to the satisfaction of the Trustee the pledgee's right to vote such Notes and
that the pledgee is not the Company, any other obligor on the Notes or a Person
directly or indirectly controlling or controlled by or under direct or indirect
common control with the Company or any such other obligor. In the case of a
dispute as to such right, any decision by the Trustee taken upon the advice of
counsel shall be full protection to the Trustee. Upon request of the Trustee,
the Company shall furnish to the Trustee promptly an Officers' Certificate
listing and identifying all Notes, if any, known by the Company to be owned or
held by or for the account of any of the above-described Persons and, subject to
Section 8.1, the Trustee shall be entitled to accept such Officers' Certificate
as conclusive evidence of the facts therein set forth and of the fact that all
Notes not listed therein are outstanding for the purpose of any such
determination.

         Section 9.5.      Revocation of Consents; Future Holders Bound.

         At any time prior to (but not after) the evidencing to the Trustee, as
provided in Section 9.1, of the taking of any action by the Holders of the
percentage in aggregate principal amount of the Notes specified in this
Indenture in connection with such action, any Holder of a Note which is shown
by the evidence to be included in the Notes the Holders of which have consented
to such action may, by filing written notice with the Trustee at its Corporate
Trust Office and upon proof of holding as provided in Section 9.2, revoke such
action so far as it concerns such Note. Except as aforesaid, any such action
taken by the Holder of any Note shall be conclusive and binding upon such
Holder and upon all future Holders and owners of such Note and of any Notes
issued in exchange or substitution therefor, irrespective of whether any
notation in regard thereto is made upon such Note or any Note issued in
exchange or substitution therefor.


                                      37
<PAGE>   103
                                    ARTICLE X
                              NOTEHOLDERS' MEETINGS

         Section 10.1.     Purpose of Meetings.

         A meeting of Holders may be called at any time and from time to time
pursuant to the provisions of this Article X for any of the following purposes:

                  (a)      to give any notice to the Company or to the Trustee
or to give any directions to the Trustee permitted under this Indenture, or to
consent to the waiving of any default or Event of Default hereunder and its
consequences, or to take any other action authorized to be taken by Holders
pursuant to any of the provisions of Article VII;

                  (b)      to remove the Trustee and nominate a successor
Trustee pursuant to the provisions of Article VIII;

                  (c)      to consent to the execution of an indenture or
indentures supplemental hereto pursuant to the provisions of Section 11.2; or

                  (d)      to take any other action authorized to be taken by or
on behalf of the Holders of any specified aggregate principal amount of the
Notes under any other provision of this Indenture or under applicable law.

         The Trustee may at any time call a meeting of Holders to take any
action specified in Section 10.1, to be held at such time and at such place at a
location within ten (10) miles of the Corporate Trust Office or in New York, New
York, as the Trustee shall determine. Notice of every meeting of the Holders,
setting forth the time and the place of such meeting and in general terms the
action proposed to be taken at such meeting and the establishment of any record
date pursuant to Section 9.1, shall be mailed to Holders of Notes at their
addresses as they shall appear on the Note register. Such notice shall also be
mailed to the Company. Such notices shall be mailed not less than 20 nor more
than 90 days prior to the date fixed for the meeting.

         Any meeting of Holders shall be valid without notice if the Holders of
all Notes then outstanding are present in Person or by proxy or if notice is
waived before or after the meeting by the Holders of all Notes outstanding, and
if the Company and the Trustee are either present by duly authorized
representatives or have, before or after the meeting, waived notice.

         Section 10.3.     Call of Meetings by Company or Holders.

         In case at any time the Company, pursuant to a resolution of its Board
of Directors, or the Holders of at least ten percent in aggregate principal
amount of the Notes then outstanding, shall have requested the Trustee to call a
meeting of Holders, by written request setting forth in reasonable detail the
action proposed to be taken at the meeting, and the Trustee shall not have
mailed the notice of such meeting within 20 days after receipt of such request,
then the Company or such Holders may determine the time and the place at any
location within 10 miles of the Corporate Trust Office or New York, New York for
such meeting and may call such meeting to take any action authorized in Section
10.1, by mailing notice thereof as provided in Section 10.2.

                                       38
<PAGE>   104

         Section 10.4.     Qualifications for Voting.

         To be entitled to vote at any meeting of Holders a Person shall (a) be
a Holder of one or more Notes on the record date pertaining to such meeting or
(b) be a Person appointed by an instrument in writing as proxy by a Holder of
one or more Notes. The only Persons who shall be entitled to be present or to
speak at any meeting of Holders shall be the Persons entitled to vote at such
meeting and their counsel and any representatives of the Trustee and its counsel
and any representatives of the Company and its counsel.

         Section 10.5.     Regulations.

         Notwithstanding any other provisions of this Indenture, the Trustee may
make such reasonable regulations as it may deem advisable for any meeting of
Holders, in regard to proof of the holding of Notes and of the appointment of
proxies, and in regard to the appointment and duties of inspectors of votes, the
submission and examination of proxies, certificates and other evidence of the
right to vote, and such other matters concerning the conduct of the meeting as
it shall think fit.

         The Trustee shall, by an instrument in writing, appoint a temporary
chairman of the meeting, unless the meeting shall have been called by the
Company or by Holders as provided in Section 10.3, in which case the Company or
the Holders calling the meeting, as the case may be, shall in like manner
appoint a temporary chairman. A permanent chairman and a permanent secretary of
the meeting shall be elected by vote of the Holders of a majority in principal
amount of the Notes represented at the meeting and entitled to vote at the
meeting.

         Subject to the provisions of Section 9.4, at any meeting each
Noteholder or proxy Holder shall be entitled to one vote for each $1,000
principal amount of Notes then outstanding and held or represented by him,
provided, however, that no vote shall be cast or counted at any meeting in
respect of any Note challenged as not outstanding and ruled by the chairman of
the meeting to be not outstanding. The chairman of the meeting shall have no
right to vote other than by virtue of Notes held by him or instruments in
writing as aforesaid duly designating him as the proxy vote on behalf of other
Holders. Any meeting of Holders duly called pursuant to the provisions of
Section 10.2 or 10.3 may be adjourned from time to time by the Holders of a
majority of the aggregate principal amount of Notes represented at the meeting,
whether or not constituting a quorum, and the meeting may be held as so
adjourned without further notice.

         Section 10.6.     Voting.

         The vote upon any resolution submitted to any meeting of Holders shall
be by written ballot on which shall be subscribed the signatures of the Holders
of Notes or of their representative by proxy and the principal amount of the
Notes held or represented by them. The permanent chairman of the meeting shall
appoint two inspectors of votes who shall count all votes cast at the meeting
for or against any resolution and who shall make and file with the secretary of
the meeting their verified written reports in duplicate of all votes cast at the
meeting. A record in duplicate of the proceedings of each meeting of Holders
shall be prepared by the secretary of the meeting and there shall be attached to
said record the original reports of the inspectors of votes on any vote by
ballot taken thereat and affidavits by one or more Persons

                                       39
<PAGE>   105

having knowledge of the facts setting forth a copy of the notice of the meeting
and showing that said notice was mailed as provided in Section 10.2. The record
shall show the principal amount of the Notes voting in favor of or against any
resolution. The record shall be signed and verified by the affidavits of the
permanent chairman and secretary of the meeting and one of the duplicates shall
be delivered to the Company and the other to the Trustee to be preserved by the
Trustee, the latter to have attached thereto the ballots voted at the meeting.

         Any record so signed and verified shall be conclusive evidence of the
matters therein stated.

         Section 10.7.     No Delay of Rights by Meeting.

         Nothing in this Article X shall be deemed or construed to authorize or
permit, by reason of any call of a meeting of Holders or any rights expressly or
impliedly conferred hereunder to make such call, any hindrance or delay in the
exercise of any right or rights conferred upon or reserved to the Trustee or to
the Holders under any of the provisions of this Indenture or of the Notes.

                                   ARTICLE XI
                             SUPPLEMENTAL INDENTURES

         Section 11.1.     Supplemental Indentures Without Consent of Holders.

         The Company, when authorized by resolutions of the Board of Directors
certified by its Secretary or an Assistant Secretary, and the Trustee may from
time to time and at any time enter into an indenture or indentures supplemental
hereto for one or more of the following purposes:

                  (a)      to make provisions with respect to the conversion
rights of the Holders of Notes pursuant to the requirements of Section 15.6;

                  (b)      to convey, transfer, assign, mortgage or pledge to
the Trustee as security for the Notes, any property or assets;

                  (c)      to evidence the succession of another corporation to
the Company, or successive successions, and the assumption by the successor
corporation of the covenants, agreements and obligations of the Company pursuant
to Article XII;

                  (d)      to add to the covenants of the Company such further
covenants, restrictions or conditions as the Board of Directors and the Trustee
shall consider to be for the benefit of the Holders of Notes, and to make the
occurrence, or the occurrence and continuance, of a default in any such
additional covenants, restrictions or conditions a default or an Event of
Default permitting the enforcement of all or any of the several remedies
provided in this Indenture as herein set forth provided, however, that in
respect of any such additional covenant, restriction or conditions such
supplemental indenture may provide for a particular period of grace after
default (which period may be shorter or longer than that allowed in the case of
other defaults) or may provide for an immediate enforcement upon such default or
may limit the remedies available to the Trustee upon such default;

                                       40
<PAGE>   106

                  (e)      to provide for the issuance under this Indenture of
Notes in coupon form (including Notes registrable as to principal only) and to
provide for exchangeability of such Notes with the Notes issued hereunder in
fully registered form and to make all appropriate changes for such purpose;

                  (f)      to cure any ambiguity or to correct or supplement any
provision contained herein or in any supplemental indenture which may be
defective or inconsistent with any other provisions contained herein or in any
supplemental indenture, or to make such other provisions in regard to matters or
questions arising under this Indenture which shall not materially adversely
affect the interests of the Holders;

                  (g)      to evidence and provide for the acceptance of
appointment hereunder by a successor Trustee with respect to the Notes; or

                  (h)      to modify, eliminate or add to the provisions of this
Indenture to such extent as shall be necessary to effect the qualification of
this Indenture under the Trust Indenture Act, or under any similar federal
statute hereafter enacted.

         The Trustee is hereby authorized to join with the Company in the
execution of any such supplemental indenture, to make any further appropriate
agreements and stipulations which may be therein contained and to accept the
conveyance, transfer and assignment of any property thereunder, but the Trustee
shall not be obligated to, but may in its discretion, enter into any
supplemental indenture which affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

         Any supplemental indenture authorized by the provisions of this Section
11.1 may be executed by the Company and the Trustee without the consent of the
Holders of any of the Notes at the time outstanding, notwithstanding any of the
provisions of Section 11.2.

         Section 11.2.     Supplemental Indentures With Consent of Holders.

         With the consent (evidenced as provided in Article IX) of the Holders
of not less than a majority in aggregate principal amount of the Notes at the
time outstanding determined in accordance with Section 9.4, the Company, when
authorized by the resolutions of the Board of Directors, and the Trustee may
from time to time and at any time enter into an indenture or indentures
supplemental hereto for the purpose of adding any provisions to or changing in
any manner or eliminating any of the provisions of this Indenture or any
supplemental indenture or of modifying in any manner the rights of the Holders,
provided, however, that no such supplemental indenture shall (i) extend the
fixed maturity of any Note, or reduce the rate or extend the time of payment of
interest thereon, or reduce the principal amount thereof, or reduce any amount
payable on redemption thereof, or impair the right of any Noteholder to
institute suit for the payment thereof, or make the principal thereof or
interest thereon payable in any coin or currency other than that provided in the
Notes, or impair the right pursuant to Article XV, to convert the Notes into
Common Stock in any material respect, without the consent of the Holder of each
Note so affected, or (ii) reduce the aforesaid percentage of Notes, the Holders
of which are required to consent to any such supplemental indentures, without
the consent of the Holders of all Notes then outstanding.

                                       41
<PAGE>   107

         Upon the request of the Company, accompanied by a copy of the
resolutions of the Board of Directors certified by its Secretary or an Assistant
Secretary authorizing the execution of any such supplemental indentures, and
upon the filing with the Trustee of evidence of the consent of Holders as
aforesaid the Trustee shall join with the Company in the execution of such
supplemental indentures unless such supplemental indenture affects the Trustee's
own rights, duties or immunities under this Indenture or otherwise, in which
case the Trustee may in its discretion, but shall not be obligated to, enter
into such supplemental indenture.

         It shall not be necessary for the consent of the Holders under this
Section 11.2 to approve the particular form of any proposed supplemental
indenture, but it shall be sufficient if such consent shall approve the
substance thereof.

         Section 11.3.     Effect of Supplemental Indenture.

         Any supplemental indenture executed pursuant to the provisions of this
Article XI shall comply with the Trust Indenture Act, as then in effect,
provided that this Section 11.3 shall not require such supplemental indenture or
the Trustee to be qualified under the Trust Indenture Act prior to the time such
qualification is in fact required under the terms of the Trust Indenture Act or
the Indenture has been qualified under the Trust Indenture Act, nor shall it
constitute any admission or acknowledgment by any party to such supplemental
indenture that any such qualification is required prior to the time such
qualification is in fact required under the terms of the Trust Indenture Act or
the Indenture has been qualified under the Trust Indenture Act. Upon the
execution of any supplemental indenture pursuant to the provisions of this
Article XI, this Indenture shall be and be deemed to be modified and amended in
accordance therewith and the respective rights, limitation of rights,
obligations, duties and immunities under this Indenture of the Trustee, the
Company and the Holders of Notes shall thereafter be determined, exercised and
enforced hereunder subject in all respects to such modifications and amendments
and all the terms and conditions of any such supplemental indenture shall be and
be deemed to be part of the terms and conditions of this Indenture for any and
all purposes.

         Section 11.4.     Notation on Notes.

         Notes authenticated and delivered after the execution of any
supplemental indenture pursuant to the provisions of this Article XI may bear a
notation in form approved by the Trustee as to any matter provided for in such
supplemental indenture. If the Company or the Trustee shall so determine, new
Notes so modified as to conform, in the opinion of the Trustee and the Board of
Directors, to any modification of this Indenture contained in any such
supplemental indenture may, at the Company's expense, be prepared and executed
by the Company, authenticated by the Trustee (or an authenticating agent duly
appointed by the Trustee pursuant to Section 16.11) and delivered in exchange
for the Notes then outstanding, upon surrender of such Notes then outstanding.

         Section 11.5.     Evidence of Compliance of Supplemental Indenture to
                           Be Furnished Trustee.

         The Trustee, subject to the provisions of Sections 8.1 and 8.2, may
require an Officers' Certificate and an Opinion of Counsel as conclusive
evidence that any supplemental indenture

                                       42
<PAGE>   108

executed pursuant hereto complies with the requirements of this Article XI.

                                   ARTICLE XII
                CONSOLIDATION, MERGER, SALE, CONVEYANCE AND LEASE

         Section 12.1.     Company May Consolidate Etc. on Certain Terms.

         Subject to the provisions of Sections 12.2 and 16.1, nothing contained
in this Indenture or in any of the Notes shall prevent any consolidation or
merger of the Company with or into any other corporation or corporations
(whether or not affiliated with the Company), or successive consolidations or
mergers in which the Company or its successor or successors shall be a party or
parties, or shall prevent any sale, conveyance or lease (or successive sales,
conveyances or leases) of the property of the Company, substantially as an
entirety, to any other corporation (whether or not affiliated with the Company),
authorized to acquire and operate the same and which, in each case, shall be
organized under the laws of the United States of America, any state thereof or
the District of Columbia, provided, that upon any such consolidation, merger,
sale, conveyance or lease, if the Company is not the surviving entity, the due
and punctual payment of the principal of and interest on all of the Notes,
according to their tenor, and the due and punctual performance and observance of
all of the covenants and conditions of this Indenture to be performed by the
Company, shall be expressly assumed, by supplemental indenture satisfactory in
form to the Trustee, executed and delivered to the Trustee by the corporation
(if other than the Company) formed by such consolidation, or into which the
Company shall have been merged, or by the corporation which shall have acquired
or leased such property, and such supplemental indenture shall provide for the
applicable conversion rights set forth in Section 15.6.

         Section 12.2.     Successor Corporation to Be Substituted.

         In case of any such consolidation, merger, sale, conveyance or lease
referenced in Section 12.1 and upon the assumption by any successor corporation,
by supplemental indenture required by Section 12.1, executed and delivered to
the Trustee and satisfactory in form to the Trustee, of the due and punctual
payment of the principal of and interest on all of the Notes and the due and
punctual performance of all of the covenants and conditions of this Indenture to
be performed by Company, such successor corporation shall succeed to and be
substituted for the Company, with the same effect as if it had been named herein
as such. Such successor corporation thereupon may cause to be signed and may
issue either in its own name or in the name of the Company any or all of the
Notes issuable hereunder which theretofore shall not have been signed by the
Company and delivered to the Trustee and, upon the order of such successor
corporation instead of the Company and subject to all the terms, conditions and
limitations in this Indenture prescribed, the Trustee shall authenticate and
shall deliver, or cause to be authenticated and delivered, any Notes which
previously shall have been signed and delivered by the Officers of the Company
to the Trustee for authentication, and any Notes which such successor
corporation thereafter shall cause to be signed and delivered to the Trustee for
that purpose. All the Notes so issued shall in all respects have the same legal
rank and benefit under this Indenture as the Notes theretofore or thereafter
issued in accordance with the terms of this Indenture as though all of such
Notes had been issued at the date of the execution hereof. In the event of any
such consolidation, merger, sale or conveyance (but not in the event of any such
lease), the Person named as the "Company" in the first paragraph of this
Indenture or any successor which

                                       43
<PAGE>   109

shall thereafter have become such in the manner prescribed in this Article XII
shall be released from its liabilities as obligor and maker of the Notes and
from its obligations under this Indenture.

         In case of any such consolidation, merger, sale, conveyance or lease,
such changes in phraseology and form (but not in substance) may be made in the
Notes thereafter to be issued as may be appropriate.

         Section 12.3.     Opinion of Counsel to Be Given Trustee.

         The Trustee, subject to Sections 8.1 and 8.2, shall receive an
Officers' Certificate and an Opinion of Counsel as conclusive evidence that any
such consolidation, merger, sale, conveyance or lease and any such assumption
complies with the provisions of this Article XII.


                                  ARTICLE XIII
                     SATISFACTION AND DISCHARGE OF INDENTURE

         Section 13.1.     Discharge of Indenture.

         When (a) the Company shall deliver to the Trustee for cancellation all
Notes theretofore authenticated (other than any Notes which have been mutilated,
destroyed, lost or stolen and in lieu of or in substitution for which other
Notes shall have been authenticated and delivered) and not theretofore canceled,
or (b) all the Notes not theretofore canceled or delivered to the Trustee for
cancellation shall have become due and payable, or are by their terms to become
due and payable within one year or are to be canceled for redemption within one
year under arrangements satisfactory to the Trustee for the giving of notice of
redemption, and the Company shall deposit with the Trustee, in trust, monies
sufficient to pay at maturity or upon redemption of all of the Notes (other than
any Notes which shall have been mutilated, destroyed, lost or stolen and in lieu
of or in substitution for which other Notes shall have been authenticated and
delivered) not theretofore canceled or delivered to the Trustee for
cancellation, including principal and interest due or to become due to such date
of maturity or Redemption Date, as the case may be, and if in either case the
Company shall also pay or cause to be paid all other sums payable hereunder by
the Company, then this Indenture shall cease to be of further effect (except as
to (i) remaining rights of registration of transfer, substitution and exchange
and conversion of Notes, (ii) rights hereunder of Holders to receive payments of
principal of and interest on, the Notes and the other rights, duties and
obligations of Holders, as beneficiaries hereof with respect to the amounts, if
any, so deposited with the Trustee and (iii) the rights, obligations and
immunities of the Trustee hereunder), and the Trustee, on demand of the Company
accompanied by an Officers' Certificate and an Opinion of Counsel as required by
Section 16.5 and at the cost and use of the Company, shall execute proper
instruments acknowledging satisfaction of and discharging this Indenture the
Company, however, hereby agreeing to reimburse the Trustee for any costs or
expenses thereafter reasonably and properly incurred by the Trustee and to
compensate the Trustee for any services thereafter reasonably and properly
rendered by the Trustee in connection with this Indenture or the Notes.

                                       44
<PAGE>   110

         Section 13.2.     Deposited Monies to Be Held in Trust by Trustee.

         Subject to Section 13.4, all monies deposited with the Trustee pursuant
to Section 13.1 shall be held in trust for the sole benefit of the Holders, and
such monies shall be applied by the Trustee to the payment, either directly or
through any Paying Agent (including the Company if acting as its own Paying
Agent), to the Holders of the particular Notes for the payment or redemption of
which such monies have been deposited with the Trustee, of all sums due and to
become due thereon for principal and interest.

         Section 13.3.     Paying Agent to Repay Monies Held.

         Upon the satisfaction and discharge of this Indenture, all monies then
held by any Paying Agent for the Notes (other than the Trustee) shall, upon
written request of the Company, be repaid to the Company or paid to the Trustee,
and thereupon such Paying Agent shall be released from all further liability
with respect to such monies.

         Section 13.4.     Return of Unclaimed Monies.

         Subject to the requirement of applicable law, any monies deposited with
or paid to the Trustee for payment of the principal of or interest on Notes and
not applied but remaining unclaimed by the Holders of Notes for two years after
the date upon which the principal of or interest on such Notes, as the case may
be, shall have become due and payable, shall be repaid to the Company by the
Trustee on demand and all liability of the Trustee shall thereupon cease with
respect to such monies, and the Holder of any of the Notes shall thereafter look
only to the Company for any payment which such Holder may be entitled to collect
except if an applicable abandoned property law does not so permit.

         Section 13.5.     Reinstatement.

         If the Trustee or the Paying Agent is unable to apply any money in
accordance with Section 13.2 by reason of any order or judgment of any court of
governmental authority enjoining, restraining or otherwise prohibiting such
application, the Company's obligations under this Indenture and the Notes shall
be revived and reinstated as though no deposit had occurred pursuant to Section
13.1 until such time as the Trustee or the Paying Agent is permitted to apply
all such money in accordance with Section 13.2, provided, however, that if the
Company makes any payment of interest on or principal of any Note following the
reinstatement of its obligations, the Company shall be subrogated to the rights
of the Holders of such Notes to receive such payment from the money held by the
Trustee or Paying Agent.

                                       45
<PAGE>   111

                                   ARTICLE XIV
                    IMMUNITY OF INCORPORATORS, STOCKHOLDERS,
                             OFFICERS AND DIRECTORS

         Section 14.1.     Indenture and Notes Solely Corporate Obligations.

         No recourse for the payment of the principal of or interest on any
Note, or for any claim based thereon or otherwise in respect thereof, and no
recourse under or upon any obligation, covenant or agreement of the Company in
this Indenture or in any supplemental indenture or in any Note, or because of
the creation of any Indebtedness represented thereby, shall be had against any
incorporator, stockholder, employee, agent, Officer, or director or subsidiary,
as such, past, present or future, of the Company or of any successor
corporation, either directly or through the Company or any successor
corporation, whether by virtue of any constitution, statute or rule of law, or
by the enforcement of any assessment or penalty or otherwise it being expressly
understood that all such liability is hereby expressly waived and released as a
condition of, and as a consideration for, the execution of this Indenture and
the issue of the Notes.

                                   ARTICLE XV
                               CONVERSION OF NOTES

         Section 15.1.     Right to Convert.

         Subject to and upon compliance with the provisions of this Indenture,
the Holder of any Series A Note shall have the right, at his option, at any time
prior to the Maturity Date (except that, with respect to any Note which shall be
called for redemption, such right shall terminate, except as provided in Section
3.4, at the close of business on the fifth Business Day preceding the Redemption
Date of such Series A Note, unless the Company shall default in payment due upon
redemption thereof) to convert the principal amount of any such Note or any
portion of such principal amount which is $1,000 or an integral multiple
thereof, (together with any accrued but unpaid dividends thereon), into that
number of fully paid and non-assessable shares of Common Stock (rounded down to
the nearest whole number) obtained by dividing the principal amount of the
Series A Note or portion thereof surrendered for conversion, together with any
accrued but unpaid dividends thereon, by the Series A Conversion Price in effect
at such time, by surrender of the Note so to be converted in whole or in part in
the manner provided. A Holder of Series A Notes is not entitled to any rights of
a holder of Common Stock until such Holder has converted his Series A Notes to
Common Stock, and then only to the extent such Notes are deemed to have been
converted to Common Stock under this Article XV.

         Subject to and upon compliance with the provisions of this Indenture,
the Holder of any Series B Note shall have the right, at his option, at any time
prior to the Maturity Date (except that, with respect to any Note which shall be
called for redemption, such right shall terminate, except as provided in Section
3.4, at the close of business on the fifth Business Date preceding the
Redemption Date of such Series B Note, unless the Company shall default in
payment due upon redemption thereof) to convert the principal amount of any such
Note, or any portion of such principal amount which is $1,000 or an integral
multiple thereof, (together with any accrued but unpaid dividends thereon) into
that number of fully paid and non-assessable shares of Series B Preferred Stock
(rounded down to the nearest whole number) obtained by dividing the

                                       46
<PAGE>   112

principal amount, together with any accrued but unpaid dividends thereon, of the
Series B Note or a portion thereof surrendered for conversion by the Series B
Conversion Price in effect at such time, by surrender of the Note so to be
converted in whole or in part in the manner provided. A Holder of Series B Notes
is not entitled to any rights of a Holder of Series B Preferred Stock until such
Holder has converted his Series B Notes to Series B Preferred Stock, and then
only to the extent such Notes are deemed to have been converted to Series B
Preferred Stock under this Article XV.

         Section 15.2.     Exercise of Conversion Privilege; Issuance of Common
                           Stock and Preferred Stock on Conversion.

         In order to exercise the conversion privilege with respect to any Note
in certificated form, the Holder of any such Note to be converted in whole or in
part shall surrender such Note, duly endorsed, at an office or agency maintained
by the Company pursuant to Section 5.3, and shall give written notice of
conversion in the form provided on the Notes (or such other notice which is
acceptable to the Company) to such office or agency that the Holder elects to
convert such Note or the portion thereof specified in said notice. Such notice
shall also state the name or names (with address or addresses) in which the
certificate or certificates for shares of Common Stock or Series B Preferred
Stock, as applicable, which shall be issuable on such conversion shall be
issued, and shall be accompanied by transfer taxes, if required pursuant to
Section 15.7. Each such Note surrendered for conversion shall, unless the shares
issuable on conversion are to be issued in the same name as the registration of
such Note, be duly endorsed by, or be accompanied by instruments of transfer in
form satisfactory to the Company duly executed by, the Holder or his duly
authorized attorney.

         As promptly as practicable after satisfaction of the requirements for
conversion set forth above, subject to compliance with any restrictions on
transfer if shares issuable on conversion are to be issued in a name other than
that of the Noteholder (as if such transfer were a transfer of the Note or Notes
(or portion thereof) so converted), the Company shall issue and shall deliver to
such Holder at the office or agency maintained by the Company for such purpose
pursuant to Section 5.3, a certificate or certificates for the number of full
shares of Common Stock or Series B Preferred Stock, as applicable, issuable upon
the conversion of such Note or portion thereof in accordance with the provisions
of this Article. In case any Note of a denomination greater than $1,000 shall be
surrendered for partial conversion, and subject to Section 2.3, the Company
shall execute and the Trustee shall authenticate and deliver to the Holder of
the Note so surrendered, without charge to him, a new Note or Notes in
authorized denominations in an aggregate principal amount equal to the
unconverted portion of the surrendered Note.

         Each conversion shall be deemed to have been effected as to any such
Note (or portion thereof) on the date on which the requirements set forth above
in this Section 15.2 have been satisfied as to such Note (or portion thereof)
(the "Conversion Date"), and the Person in whose name any certificate or
certificates for shares of Common Stock or Series B Preferred Stock, as
applicable, shall be issuable upon such conversion shall be deemed to have
become, on said date, the Holder of record of the shares represented thereby,
provided, however, that any such surrender on any date when the stock transfer
books of the Company shall be closed shall constitute the Person in whose name
the certificates are to be issued as the record Holder thereof for all purposes
on the next succeeding day on which such stock transfer books are open, but

                                       47
<PAGE>   113

such conversion shall be at the Conversion Price in effect on the date upon
which such Note shall be surrendered.

         Section 15.3.     No Issuance of Fractional Shares.

         No fractional shares of Common Stock or Series B Preferred Stock or
scrip representing fractional shares shall be issued upon conversion of the
Notes and the number of shares of Common Stock or Series B Preferred Stock, as
applicable, issuable to a Holder shall be rounded down to the nearest whole
number. If more than one Note of the same Series shall be surrendered for
conversion at one time by the same Holder, the number of full shares which shall
be issuable upon conversion shall be computed on the basis of the aggregate
principal amount (together with accrued but unpaid interest thereon) of such
Notes (or specified portions thereof to the extent permitted hereby) so
surrendered. If any fractional share of stock would be issuable to a Holder upon
the conversion of any Note or Notes, such fractional shares shall be aggregated
with any fractional shares otherwise issuable in connection with any subsequent
conversion by such Holder of the same Series of Notes and each time a fractional
share shall equal one full share, such full share shall be issued to such
Holder.

         Section 15.4.     Conversion Price.

         The Series A Conversion Price shall be $4.00, subject to adjustment as
provided in this Article XV. The Series B Conversion Price shall be one hundred
(100) times the Series A Conversion Price (as such Series A Conversion Price is
adjusted from time to time pursuant to the provisions hereof).

         Section 15.5.     Adjustment of Conversion Price.

         The Conversion Price shall be adjusted from time to time by the Company
as follows:

         (a) The Series A Conversion Price shall be subject to adjustment as
follows:

                  (i)    In case the Company shall (A) pay or make a dividend or
other distribution on the outstanding shares of Common Stock in shares of Common
Stock, (B) subdivide or reclassify the outstanding shares of Common Stock into a
greater number of shares, or (C) combine or reclassify the outstanding shares of
Common Stock into a smaller number of shares, the Series A Conversion Price in
effect at the opening of business on the day following the date fixed for the
determination of stockholders entitled to receive such dividend or other
distribution or subject to such subdivision, combination or reclassification
shall be adjusted by multiplying such Series A Conversion Price by a fraction of
which the numerator shall be the number of shares of Common Stock outstanding at
the close of business on the date fixed for such determination and of which the
denominator shall be the sum of such number of shares outstanding immediately
after the event described in clause (A), (B) or (C) of this Section 15.5(a)(i),
such adjustment to the Conversion Price to become effective immediately after
the opening of business on the day following the date fixed for such
determination.

                  (ii)   In case the Company shall issue rights, options or
warrants to all holders of Common Stock entitling them to subscribe for or
purchase shares of Common Stock at a price per share less than the Series A
Conversion Price in effect immediately prior to the date fixed for

                                       48
<PAGE>   114

the determination of stockholders entitled to receive such rights, options or
warrants (the "Pre-Determination Conversion Price"), the Series A Conversion
Price in effect at the opening of business on the day following the date fixed
for such determination shall be reduced by multiplying the Pre-Determination
Conversion Price by a fraction of which the numerator shall be the number of
shares of Common Stock outstanding at the close of business on the date fixed
for such determination plus the number of shares of Common Stock which the
aggregate offering price of the total number of shares of Common Stock so
offered for subscription would purchase at the Pre-Determination Conversion
Price, and of which the denominator shall be the number of shares of Common
Stock outstanding at the close of business on the date fixed for such
determination plus the number of shares of Common Stock so offered for
subscription or purchase, such reduction of the Series A Conversion Price to
become effective immediately after the opening of business on the day following
the date fixed for such determination.

                  (iii)    In case the Company shall, by dividend or otherwise,
distribute to all holders of Common Stock (A) shares of capital stock of any
class other than Common Stock, (B) evidences of its indebtedness or (C) assets
(excluding any rights, options or warrants referred to in paragraph (ii) of this
Section 15.5(a), any cash dividend or distribution lawfully paid under the laws
of the state of incorporation of the Company, and any dividend or distribution
referred to in paragraph (i) of this Section 15.5(a)(i)), the Series A
Conversion Price shall be adjusted so that the same shall equal the price
determined by multiplying the Series A Conversion Price in effect immediately
prior to the close of business on the date fixed for the determination of
stockholders entitled to receive such distribution (the "Pre-Determination
Conversion Price") by a fraction of which the numerator shall be the
Pre-Determination Conversion Price less the fair market value (as determined by
the Board of Directors of the Company) of the portion of the shares of capital
stock or evidences of indebtedness or assets so distributed applicable to one
share of Common Stock, and of which the denominator shall be the
Pre-Determination Conversion Price, such adjustment to become effective
immediately prior to the opening of business on the day following the date fixed
for the determination of shareholders entitled to receive such distribution.

                  (iv)     In case the Company shall issue any securities
convertible into or exchangeable for Common Stock (other than securities issued
in transactions described in paragraph (ii) of this Section 15.5(a)), for a
consideration per share of Common Stock less than the Series A Conversion Price
immediately prior to the date of issuance of such securities (the "Pre-Issuance
Conversion Price"), the Series A Conversion Price shall be adjusted immediately
thereafter so that it shall equal the price determined by multiplying the
Pre-Issuance Conversion Price by a fraction, of which the numerator shall be the
number of shares of Common Stock outstanding immediately prior to the issuance
of such securities plus the number of shares of Common Stock which the aggregate
consideration received for such securities would purchase at the Pre-Issuance
Conversion Price, and of which the denominator shall be the number of shares of
Common Stock outstanding immediately prior to such issuance plus the maximum
number of shares of Common Stock deliverable upon conversion of or in exchange
for such securities at the initial conversion or exchange price or rate. Upon
the termination of the right to convert or exchange such securities, the Series
A Conversion Price shall forthwith be readjusted to such Series A Conversion
Price as would have obtained had the adjustments made upon the issuance of such
convertible or exchangeable securities been made upon the basis of the delivery
of only the number of shares of Common Stock actually delivered upon conversion
or exchange of such

                                       49
<PAGE>   115

securities and upon the basis of the consideration actually received by the
Company for such securities.

                  (v)      In case of any reclassification of the Common Stock
(including any reclassification upon a consolidation or merger in which the
Company is the continuing or surviving company) into securities other than
Common Stock, the Series A Notes shall thereafter be convertible into the kind
and amount of shares of such securities receivable upon such reclassification by
a holder of the number of shares of Common Stock into which the Series A Notes
would be convertible immediately prior to such reclassification.

                  (vi)     In case the Company shall issue shares of Common
Stock for a consideration per share less than the Series A Conversion Price
immediately prior to the date on which the Company fixes the offering price of
such additional shares (the "Pre-Offering Conversion Price"), the Series A
Conversion Price shall be adjusted immediately thereafter so that it shall equal
the price determined by multiplying the Pre-Offering Conversion Price by a
fraction, of which the numerator shall be the total number of shares of Common
Stock outstanding immediately prior to the issuance of such additional shares
plus the number of shares of Common Stock which the aggregate consideration
received for the issuance of such additional shares would purchase at the
Pre-Offering Conversion Price, and of which the denominator shall be the number
of shares of Common Stock outstanding immediately after the issuance of such
additional shares. There shall be no adjustment, however, pursuant to this
paragraph (vi) with respect to any shares of Common Stock issued (A) in any of
the transactions described in paragraph (ii) of this Section 15.5(a) where there
has been an adjustment in respect thereto; (B) upon conversion or exchange of
securities convertible into or exchangeable for Common Stock where there has
been an adjustment; (C) upon the exercise of any stock option outstanding on the
first date that Notes are issued pursuant to this Indenture (the "Original Issue
Date"); (D) upon the exercise of any stock option granted by the Company
(provided that such option grant does not require any adjustment pursuant to
paragraph (ii) of this Section 15.5(a)) or (E) upon the conversion of any
convertible debenture of the Company outstanding on the Original Issue Date.

         (b)      The Series B Conversion Price shall be adjusted by the Company
each time the Series A Conversion Price is adjusted such that the Series B
Conversion Price shall be one hundred (100) times the Series A Conversion Price.
In addition, in case of any reclassification of the Series B Preferred Stock
(including reclassification upon a consolidation or merger in which the Company
is the continuing or surviving company) into securities other than Series B
Preferred Stock, the Series B Notes shall thereafter be convertible into the
kind and amount of such securities receivable upon such reclassification by a
holder of the number of shares of Series B Preferred Stock into which the Series
B Notes could be convertible immediately prior to such reclassification.

         (c)      Anything herein to the contrary notwithstanding, no adjustment
will be made to the Series A Conversion Price or Series B Conversion Price by
reason of the issuance of Common Stock upon the conversion of Series A Notes or
Series A Preferred Stock or the issuance of Series B Preferred Stock upon the
conversion of Series B Notes.

                                       50
<PAGE>   116

         (d)      No adjustment in the Series A Conversion Price or Series B
Conversion Price need be made unless the adjustment pursuant to this Section
15.5 would require an increase or decrease of at least 1% in the Series A
Conversion Price or Series B Conversion price, as applicable; provided, however,
that any adjustments which by reason of this paragraph are not required to be
made shall be carried forward and taken into account in any subsequent
adjustment required to be made hereunder, and, in any event, shall be made no
later than the third anniversary of the date the adjustment pursuant to Section
15.5 hereof would have been made if it would have required an increase or
decrease of at least 1% in the Series A Conversion Price or Series B Conversion
Price. All adjustments to the Conversion Price shall be made to the nearest
one-one thousandth of a dollar.

         (e)      No adjustment need be made for a change in the par value of
the Common Stock or the Series B Preferred Stock.

         (f)      In case any other stock (other than Common Stock) or other
securities (including any class or series of Preferred Stock) of any other
entity (corporate or otherwise) or the Company ("Other Securities") shall be
issued or sold or shall become subject to issue or sale upon the conversion or
exchange of any stock (or Other Securities) of the Company or to subscription,
purchase or other acquisition for a consideration such as to dilute, on a basis
consistent with the standards established in the other provisions of this
Section 15, the conversion rights of the Notes, then, and in each such case, the
computations, adjustments and readjustments provided for in this Section 15 with
respect to the Series A Conversion Price (with corresponding adjustment to the
Series B Conversion Price as set forth herein) shall be made as nearly as
possible in the manner so provided and applied to determine the amount of Other
Securities from time to time receivable upon the conversion of the Notes, so as
to protect the Holders of against the effect of such dilution.

         (g)      The Company shall reserve and at all times keep available,
free from preemptive rights, out of its authorized but unissued stock, for the
purpose of effecting the conversion of Series A Notes and Series B Notes, such
number of its duly authorized Common Stock and Series B Preferred Stock as shall
from time to time be sufficient to effect the conversion of all outstanding
shares of Series A Notes and Series B Notes. The Company covenants that all
shares of Common Stock and Series B Preferred Stock issued upon conversion of
Series A Notes or Series B Notes, as applicable, shall upon issuance, be duly
authorized, validly issued, fully paid and non-assessable and free and clear of
all liens and charges.

         Section 15.6.     Effect of Reclassification, Consolidation, Merger or
                           Sale.

         If any of the following events occur, namely (i) any reclassification
or change of the outstanding shares of Common Stock (other than a subdivision or
combination to which Section 15.5 applies), (ii) any consolidation, merger or
combination of the Company with another corporation as a result of which Holders
of Common Stock shall be entitled to receive stock, securities or other property
or assets (including cash) with respect to or in exchange for such Common Stock,
or (iii) any sale or conveyance of the properties and assets of the Company as,
or substantially as, an entirety to any other corporation as a result of which
Holders of Common Stock shall be entitled to receive stock, securities or other
property or assets (including cash) with respect to or in exchange for such
Common Stock, then the Company or the successor or

                                       51
<PAGE>   117


purchasing corporation, as the case may be, shall execute with the Trustee a
supplemental indenture (which shall comply with the Trust Indenture Act as in
force at the date of execution of such supplemental indenture) providing that
the Notes shall be convertible into the kind and amount of shares of stock and
other securities or property or assets (including cash) receivable upon such
reclassification, change, consolidation, merger, combination, sale or conveyance
by a Holder of a number of shares of Common Stock or of one hundred (100) times
the number of shares of Series B Preferred Stock issuable upon conversion of the
Notes (assuming, for such purposes, a sufficient number of authorized shares of
Common Stock or Series B Preferred Stock available to convert all such Notes)
immediately prior to such reclassification, change, consolidation, merger,
combination, sale or conveyance assuming such Holder of Common Stock or Series B
Preferred Stock did not exercise his rights of election, if any, as to the kind
or amount of shares of stock and other securities or property or assets
(including cash) receivable upon such reclassification, change, consolidation,
merger, combination, sale or conveyance (provided that, if the kind or amount of
shares of stock and other securities or property or assets (including cash)
receivable upon such reclassification, change, consolidation, merger,
combination, sale or conveyance is not the same for each share of Common Stock
or Series B Preferred Stock in respect of which such rights of election shall
not have been exercised ("nonelecting share"), then for the purposes of this
Section 15.6 the kind and amount of shares of stock and other securities or
property or assets (including cash) receivable upon such reclassification,
change, consolidation, merger, combination, sale or conveyance for each
non-electing share shall be deemed to be the kind and amount so receivable per
share by a plurality of the non-electing shares. Such supplemental indenture
shall provide for adjustments which shall be as nearly equivalent as may be
practicable to the adjustments provided for in this Article.

         The Company shall cause notice of the execution of such supplemental
indenture to be mailed to each Holder of Notes, at his address appearing on the
Note register provided for in Section 2.5 of this Indenture, within 20 days
after execution thereof. Failure to deliver such notice shall not affect the
legality or validity of such supplemental indenture.

         The above provisions of this Section shall similarly apply to
successive reclassifications, changes, consolidations, mergers, combinations,
sales and conveyances.

         If this Section 15.6 applies to any event or occurrence, Section 15.5
shall not apply.

         Section 15.7.     Taxes on Shares Issued.

         The issue of stock certificates on conversions of Notes shall be made
without charge to the converting Noteholder for any tax in respect of the issue
thereof. The Company shall not, however, be required to pay any tax which may be
payable in respect of any transfer involved in the issue and delivery of stock
in any name other than that of the Holder of any Note converted, and the Company
shall not be required to issue or deliver any such stock certificate unless and
until the Person or Persons requesting the issue thereof shall have paid to the
Company the amount of such tax or shall have established to the satisfaction of
the Company that such tax has been paid.

                                       52
<PAGE>   118

         Section 15.8.     Compliance with Governmental Requirements; Listing of
                           Common Stock and Series B Preferred Stock.

         Before taking any action which would cause an adjustment reducing the
Series A Conversion Price below the then par value, if any, of the shares of
Common Stock or the Series B Conversion Price below the then par value, if any,
of the shares of Series B Preferred Stock, the Company will take all corporate
action which may, in the opinion of its counsel, be necessary in order that the
Company may validly and legally issue shares of such Common Stock or Series B
Preferred Stock at such adjusted Series A Conversion Price or Series B
Conversion Price, as applicable.

         The Company covenants that if any shares of Common Stock or Series B
Preferred Stock to be provided for the purpose of conversion of Notes hereunder
require registration with or approval of any governmental authority under any
federal or state law before such shares may be validly issued upon conversion,
the Company will in good faith and as expeditiously as possible endeavor to
secure such registration or approval, as the case may be.

         The Company further covenants that if at any time the Common Stock or
Series B Preferred Stock shall be listed on the New York Stock Exchange, the
American Stock Exchange, the Nasdaq Stock Market (National Market), or any other
national securities exchange the Company will, if permitted by the rules of such
exchange, list and keep listed so long as the Common Stock or Series B Preferred
Stock, as applicable, shall be so listed on such exchange, all Common Stock and
Series B Preferred Stock issuable upon conversion of the Notes.

         Section 15.9.     Responsibility of Trustee.

         The Trustee and any other Conversion Agent shall not at any time be
under any duty or responsibility to any Holder of Notes to either calculate the
Series A Conversion Price or Series B Conversion Price or determine whether any
facts exist which may require any adjustment of the Series A Conversion Price or
Series B Conversion Price, or with respect to the nature or extent or
calculation of any such adjustment when made, or with respect to the method
employed, or herein or in any supplemental indenture provided to be employed, in
making the same. The Trustee and any other Conversion Agent shall not be
accountable with respect to the validity or value (or the kind or amount) of any
shares of Common Stock, Series B Preferred Stock, or of any securities or
property, which may at any time be issued or delivered upon the conversion of
any Note and the Trustee and any other Conversion Agent make no representations
with respect thereto. Subject to the provisions of Section 8.1, neither the
Trustee nor any Conversion Agent shall be responsible for any failure of the
Company to issue, transfer or deliver any shares of Common Stock or Series B
Preferred Stock or stock certificates or other securities or property or cash
upon the surrender of any Note for the purpose of conversion or to comply with
any of the duties, responsibilities or covenants of the Company contained in
this Article. Without limiting the generality of the foregoing, neither the
Trustee nor any Conversion Agent shall be under any responsibility to determine
the correctness of any provisions contained in any supplemental indenture
entered into pursuant to Section 15.6 relating either to the kind or amount of
shares of stock or securities or property (including cash) receivable by Holders
upon the conversion of their Notes after any event referred to in such Section
15.6 or to any adjustment to be made with respect thereto, but, subject to the
provisions of Section 8.1, may

                                       53
<PAGE>   119

accept as conclusive evidence of the correctness of any such provisions, and
shall be protected in relying upon, the Officers' Certificate (which the Company
shall be obligated to file with the Trustee prior to the execution of any such
supplemental indenture) with respect thereto.

         Section 15.10.    Notice of Holders Prior to Certain Actions.

         In case:

         (a)      the Company shall declare a dividend (or any other
distribution) on its Common Stock that would require an adjustment in the Series
A Conversion Price pursuant to Section 15.5; or

         (b)      the Company shall authorize the granting to all or
substantially all the Holders of its Common Stock of rights or warrants to
subscribe for or purchase any share of any class or any other rights or
warrants; or

         (c)      of any reclassification or reorganization of the Common Stock
of the Company (other than a subdivision or combination of its outstanding
Common Stock or Series B Preferred Stock, or a change in par value, or from par
value to no par value, or from no par value to par value), or of any
consolidation or merger to which the Company is a party and for which approval
of any stockholders of the Company is required, or of the sale or transfer of
all or substantially all of the assets of the Company; or

         (d)      of the voluntary or involuntary dissolution, liquidation or
winding-up of the Company,

the Company shall cause to be filed with the Trustee and to be mailed to each
Holder of Notes at his address appearing on the Note register provided for in
Section 2.4 of this Indenture, as promptly as possible but in any event at least
10 days prior to the applicable date hereinafter specified, a notice stating (x)
the date on which a record is to be taken for the purpose of such dividend,
distribution or rights or warrants, or, if a record is not to be taken, the date
as of which the holders of Common Stock of record to be entitled to such
dividend, distribution, or rights or warrants are to be determined, or (y) the
date on which such reclassification, consolidation, merger, sale, transfer,
dissolution, liquidation or winding-up is expected to become effective or occur,
and the date as of which it is expected that Holders of Common Stock or Series B
Preferred Stock of record shall be entitled to exchange their Common Stock or
Series B Preferred Stock for securities or other property deliverable upon such
reclassification, consolidation, merger, sale, transfer, dissolution,
liquidation or winding-up. Failure to give such notice, or any defect therein,
shall not affect the legality or validity of such dividend, distribution,
reclassification, consolidation, merger, sale, transfer, dissolution,
liquidation or winding-up.

                                   ARTICLE XVI
                            MISCELLANEOUS PROVISIONS

         Section 16.1.     Provisions Binding on Company's Successors.

         All the covenants, stipulations, promises and agreements by the Company
contained in

                                       54
<PAGE>   120

this Indenture shall bind its successors and assigns whether so expressed or
not.

         Section 16.2.     Official Acts by Successor Corporation.

         Any act or proceeding by any provision of this Indenture authorized or
required to be done or performed by any board, committee or Officer of the
Company shall and may be done and performed with like force and effect by the
like board, committee or Officer of any corporation that shall at the time be
the lawful sole successor of the Company.

         Section 16.3.     Addresses for Notices, Etc.

         Any notice or demand which by any provision of this Indenture is
required or permitted to be given or served by the Trustee or by the Holders of
Notes on the Company shall be deemed to have been sufficiently given or made,
for all purposes, if given or served by being deposited postage prepaid by
registered or certified mail in a post office letter box addressed (until
another address is filed by the Company with the Trustee) to Alterra Healthcare
Corporation, 1000 Innovation Drive, Milwaukee, Wisconsin 53226. Any notice,
direction, request or demand hereunder to or upon the Trustee shall be deemed to
have been sufficiently given or made, for all purposes, if given or served by
being deposited postage prepaid by registered or certified mail in a post office
letter box addressed to the Corporate Trust Office, which office is, at the date
as of which this Indenture is dated, located at [ADDRESS], Attention: [TRUSTEE]
Corporate Trust Department.

         The Trustee, by notice to the Company, may designate additional or
different addresses for subsequent notices or communications.

         Any notice or communication mailed to a Noteholder shall be mailed to
him by first class mail, postage prepaid, at his address as it appears on the
Note register and shall be sufficiently given to him if so mailed within the
time prescribed.

         Failure to mail a notice or communication to a Noteholder or any defect
in it shall not affect its sufficiency with respect to other Holders. If a
notice or communication is mailed in the manner provided above, it is duly
given, whether or not the addressee receives it.

         Section 16.4.     Governing Law.

         This Indenture and each Note shall be deemed to be a contract made
under the laws of the State of New York and for all purposes shall be construed
in accordance with the laws of the State of New York.

         Section 16.5.     Evidence of Compliance with Conditions Precedent;
                           Certificates to Trustee.

         Upon any application or demand by the Company to the Trustee to take
any action under any of the provisions of this Indenture, the Company shall
furnish to the Trustee an Officers' Certificate stating that all conditions
precedent, if any, provided for in this Indenture relating to the proposed
action have been complied with, and an Opinion of Counsel stating that, in the
opinion of such counsel, all such conditions precedent have been complied with.

                                       55
<PAGE>   121

         Each certificate or opinion provided for in this Indenture and
delivered to the Trustee with respect to compliance with a condition or covenant
provided for in this Indenture shall include (1) a statement that the Person
making such certificate or opinion has read such covenant or condition (2) a
brief statement as to the nature and scope of the examination or investigation
upon which the statement or opinion contained in such certificate or opinion is
based (3) a statement that, in the opinion of such Person, he has made such
examination or investigation as is necessary to enable him to express an
informed opinion as to whether or not such covenant or condition has been
complied with and (4) a statement as to whether or not, in the opinion of such
Person, such condition or covenant has been complied with.

         Section 16.6.     Legal Holidays.

         In any case where the date of maturity of interest on or principal of
the Notes or the date fixed for redemption of any Note will not be a Business
Day, then payment of such interest on or principal of the Notes need not be made
on such date, but may be made on the next succeeding Business Day with the same
force and effect as if made on the date of maturity or the date fixed for
redemption, and no interest shall accrue for the period from and after such
date.

         Section 16.7.     Trust Indenture Act.

         This Indenture is hereby made subject to, and shall be governed by, the
provisions of the Trust Indenture Act required to be part of and to govern
indentures qualified under the Trust Indenture Act; provided, however, that,
unless otherwise required by law, notwithstanding the foregoing, this Indenture
and the Notes issued hereunder shall not be subject to the provisions of
subsections (a)(1), (a)(2), and (a)(3) of Section 314 of the Trust Indenture Act
as now in effect or as hereafter amended or modified; provided, further, that
this Section 16.7 shall not require this Indenture or the Trustee to be
qualified under the Trust Indenture Act prior to the time such qualification is
in fact required under the terms of the Trust Indenture Act, nor shall it
constitute any admission or acknowledgment by any party to such supplemental
indenture that any such qualification is required prior to the time such
qualification is in fact required under the terms of the Trust Indenture Act. If
any provision hereof limits, qualifies or conflicts with another provision
hereof which is required to be included in an indenture qualified under the
Trust Indenture Act, such required provision shall control.

         Section 16.8.     No Security Interest Created.

         Nothing in this Indenture or in the Notes, expressed or implied, shall
be construed to constitute a security interest under the Uniform Commercial Code
or similar legislation, as now or hereafter enacted and in effect, in any
jurisdiction where property of the Company or its subsidiaries is located.

         Section 16.9.     Benefits of Indenture.

         Nothing in this Indenture or in the Notes, expressed or implied, shall
give to any Person, other than the parties hereto, any Paying Agent, any
authenticating agent, any Custodian, any Conversion Agent, any Registrar and
their successors hereunder, the Holders of Notes and the Holders of Senior
Indebtedness, any benefit or any legal or equitable right, remedy or claim under
this Indenture.

                                       56
<PAGE>   122

         Section 16.10.    Table of Contents, Headings, Etc.

         The table of contents and the titles and headings of the articles and
sections of this Indenture have been inserted for convenience of reference only,
are not to be considered a part hereof, and shall in no way modify or restrict
any of the terms or provisions hereof.

         Section 16.11.    Authenticating Agent.

         The Trustee may appoint an authenticating agent which shall be
authorized to act on its behalf and subject to its direction in the
authentication and delivery of Notes in connection with the original issuance
thereof and transfers and exchanges of Notes hereunder, including under Sections
2.4, 2.5, 2.6, 2.7, 3.3, and 15.2, as fully to all intents and purposes as
though the authenticating agent had been expressly authorized by this Indenture
and those Sections to authenticate and deliver Notes. For all purposes of this
Indenture, the authentication and delivery of Notes by the authenticating agent
shall be deemed to be authentication and delivery of such Notes "by the Trustee"
and a certificate of authentication executed on behalf of the Trustee by an
authenticating agent shall be deemed to satisfy any requirement hereunder or in
the Notes for the Trustee's certificate of authentication. Such authenticating
agent shall at all times be a Person eligible to serve as Trustee hereunder
pursuant to Section 8.9.

         Any corporation into which any authenticating agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, consolidation or conversion to which any authenticating agent
shall be a party, or any corporation succeeding to the corporate trust business
of any authenticating agent, shall be the successor of the authenticating agent
hereunder, if such successor corporation is otherwise eligible under this
Section 16.11, without the execution or filing of any paper or any further act
on the part of the parties hereto or the authenticating agent or such successor
corporation.

         Any authenticating agent may at any time resign by giving written
notice of resignation to the Trustee and to the Company. The Trustee may at any
time terminate the agency of any authenticating agent by giving written notice
of termination to such authenticating agent and to the Company. Upon receiving
such a notice of resignation or upon such a termination, or in case at any time
any authenticating agent shall cease to be eligible under this Section, the
Trustee shall either promptly appoint a successor authenticating agent or itself
assume the duties and obligations of the former authenticating agent under this
Indenture, and upon such appointment of a successor authenticating agent, if
made, shall give written notice of such appointment of a successor
authenticating agent to the Company and shall mail notice of such appointment of
a successor authenticating agent to all Holders of Notes as the names and
addresses of such Holders appear on the Note register.

         The Trustee agrees to pay to the authenticating agent from time to time
reasonable compensation for its services (to the extent pre-approved by the
Company in writing), and the Trustee shall be entitled to be reimbursed for such
pre-approved payments, subject to Section 8.6.

         The provisions of Sections 8.2, 8.3, 8.4, 9.3 and this Section 16.11
shall be applicable to any authenticating agent.

                                       57
<PAGE>   123

         Section 16.12.    Execution in Counterparts.

         This Indenture may be executed in any number of counterparts, each of
which shall be an original, but such countervails shall together constitute but
one and the same instrument.

                                       58
<PAGE>   124

         [TRUSTEE] hereby accepts the trusts in this Indenture declared and
provided, upon the terms and conditions hereinabove set forth.

         IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly signed, all as of the date first written above.

ATTEST:                              ALTERRA HEALTHCARE CORPORATION.


- -------------------------------      By:
Title:                                  ----------------------------------------



                                     ATTEST:  [TRUSTEE], AS TRUSTEE




                                     By:
- -------------------------------         ----------------------------------------
                                     Name:
                                     Title:

                                       59
<PAGE>   125

                                    EXHIBIT A

                                 [INSERT LEGEND]

                         ALTERRA HEALTHCARE CORPORATION.

        SERIES A 9.75% CONVERTIBLE SENIOR PAY-IN-KIND DEBENTURE DUE 2007

                            No. _______ CUSIP [_____]


         ALTERRA HEALTHCARE CORPORATION, a corporation duly organized and
validly existing under the laws of the State of Delaware (herein called the
"Company"), which term includes any successor corporation under the indenture
referred to on the reverse hereof, for value received hereby promises to pay to
_____________ or registered assigns, the principal sum of [___________
($____________)] on _______________, 2007, at the office or agency of the
Company maintained for that purpose in __________, _____________, or, at the
option of the Holder of this Note, at the Corporate Trust Office, in such coin
or currency of the United States of America as at the time of payment shall be
legal tender for the payment of public and private debts, and to pay interest,
semi-annually on July 1 and January 1 of each year, commencing July 1, 2000, on
said principal sum at said office or agency, in like coin or currency or
securities, as set forth in the Indenture, at the rate per annum of 9.75%, as
adjusted from time to time as set forth in the Indenture, from the date of this
Note. The interest payable on this Note pursuant to the Indenture on any July 1
or January 1 will be paid to the person in whose name this Note (or one or more
predecessor Notes is registered at the close of business on the record date,
which shall be the June 15 or December 15 (whether or not a Business Day) next
preceding such July 1 or January 1, as provided in the Indenture provided that
any such interest not punctually paid or duly provided for shall be payable as
provided in the Indenture.

         Reference is made to the further provisions of this Note set forth on
the reverse hereof, including, without limitation, provisions giving the Holder
of this Note the right to convert this Note into Common Stock of the Company on
the terms and subject to the limitations referred to on the reverse hereof and
as more fully specified in the Indenture. Such further provisions shall for all
purposes have the same effect as though fully set forth at this place.

         This Note shall be deemed to be a contract made under the laws of the
State of New York, and for all purposes shall be construed in accordance with
and governed by the laws of said State.

         This Note shall not be valid or become obligatory for any purpose until
the certificate of authentication hereon shall have been manually signed by the
Trustee or a duly authorized authenticating agent under the Indenture.

                                      60
<PAGE>   126

         IN WITNESS WHEREOF, the Company has caused this Note to be duly
executed under its corporate seal.


DATED:  ____________, 2000

ATTEST:  ALTERRA HEALTHCARE CORPORATION



By:
   --------------------------------------------
Title:


[SEAL]


TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Notes described in the within-named Indenture.

[TRUSTEE], as Trustee



By:
   --------------------------------------------
   Name:
   Title:

                                       61
<PAGE>   127

                            [FORM OF REVERSE OF NOTE]

                         ALTERRA HEALTHCARE CORPORATION

        SERIES A 9.75% CONVERTIBLE SENIOR PAY-IN-KIND DEBENTURE DUE 2007


         1.       This Note is one of a duly authorized issue of Notes of the
Company, designated as its Series A 9.75% Convertible Senior Pay-In-Kind
Debentures due 2007 (herein called the "Notes"), limited to aggregate principal
amount of $___________ (except for Notes issued as payment of dividends pursuant
to the Indenture) issued or to be issued under and pursuant to an indenture
dated as of __________, 2000 (herein called the "Indenture"), between the
Company and [TRUSTEE], as trustee (herein called the "Trustee"), to which
Indenture and all indentures supplemental thereto reference is hereby made for a
description of the rights, limitations of rights, obligations, duties and
immunities thereunder of the Trustee, the Company and the Holders.

         2.       In case an Event of Default, as defined in the Indenture,
shall have occurred and be continuing, the principal of and accrued interest on
all Notes may be declared, and upon said declaration shall become, due and
payable, in the manner, with the effect and subject to the conditions provided
in the Indenture.

         3.       The Indenture contains provisions permitting the Company and
the Trustee, with the consent of the Holders of not less than a majority in
aggregate principal amount of the Notes as the time outstanding, evidenced as in
the Indenture provided, to execute supplemental indentures adding any provisions
to or changing in any manner or eliminating any of the provisions of the
Indenture or of any supplemental indenture or modifying in any manner the rights
of the Holders provided, however, that no such supplemental indenture shall (i)
extend the fixed maturity of any Note, or reduce the rate or extend the time of
payment of interest thereon, or reduce the principal amount thereof, or reduce
any amount payable on redemption thereof , or impair the right of any Noteholder
to institute suit for the payment thereof, or make the principal thereof payable
in any coin or currency other than that provided in the Note, or modify the
provisions of the Indenture with respect to the subordination of the Notes in a
manner adverse to the Holders in any material respect, or impair the right to
convert the Notes into Common Stock in any material respect, without the consent
of the Holder of each Note so affected or (ii) reduce the aforesaid percentage
of Notes, the Holders of which are required to consent to any such supplemental
indenture, without the consent of the Holders of all Notes then outstanding. It
is also provided in the Indenture that the Holders of a majority in aggregate
principal amount of the Notes at the time outstanding may on behalf of the
Holders of all of the Notes waive any past default or Event of Default under the
Indenture and its consequences except (i) a default in the payment of interest
on, or the principal of, the Notes, (ii) a failure by the Company to convert any
Notes into Common Stock, (iii) a default in the payment of the Redemption Price
pursuant to Article III or (iv) a default in respect of a covenant or provisions
which under Article XI cannot be modified or amended without the consent of the
Holders of all Notes then outstanding. Any such consent or waiver by the Holder
of this Note (unless revoked as provided in the Indenture)

                                       62
<PAGE>   128

shall be conclusive and binding upon such Holder and upon all future Holders and
owners of this Note and any Notes which may be issued in exchange or substitute
hereof, irrespective of whether or not any notation thereof is made upon this
Note or such other Notes.

         4.       No reference herein to the Indenture and no provision of this
Note or of the Indenture shall alter or impair the obligation of the Company,
which is absolute and unconditional, to pay the principal of and interest on
this Note at the place, at the respective times, at the rate and in the coin or
currency or securities herein prescribed.

         5.       The Notes are issuable in registered form without coupons in
minimum denominations of $1,000 and any integral multiple of $1,000. At the
office or agency of the Company referred to on the face hereof, and in the
manner and subject to the limitations provided in the Indenture, without payment
of any service charge but with payment of a sum sufficient to cover any tax or
other governmental charge that may be imposed in connection with any
registration or exchange of Notes, Notes may be exchanged for a like aggregate
principal amount of Notes of other authorized denominations.

         6.       The Notes will not be redeemable at the option of the Company
prior to _____________, 2003. At any time after ____________, 2003, and prior to
maturity, the Notes may be redeemed at the option of the Company from time to
time, on such notice, on such conditions and at such price as provided in the
Indenture.

         7.       Subject to the provisions of the Indenture, the Holder hereof
has the right, at its option, at any time prior to the close of business on the
maturity date, subject to prior redemption, or, as to all or any portion hereof
called for redemption, prior to the close of business on the fifth Business day
preceding the date fixed for redemption (unless the Company shall default in
payment due upon redemption thereof), to convert the principal hereof or any
portion of such principal which is $1,000 or an integral multiple thereof, (and
any accrued but unpaid dividends thereon) into that number of shares of the
Company's Common Stock obtained by dividing the principal amount of this Note or
portion thereof to be converted (together with any accrued but unpaid dividends
thereon) by the Conversion Price of $_____________, as such Conversion Price is
adjusted from time to time as provided in the Indenture, upon surrender of this
Note, together with a conversion notice as provided in the Indenture, to the
Company at the office or agency of the Company maintained for that purpose in
______________________, or at the option of such Holder, the Corporate Trust
Office, and, unless the shares issuable on conversion are to be issued in the
same name as this Note, duly endorsed by, or accompanied by instruments of
transfer in form satisfactory to the Company duly executed by, the Holder or by
his duly authorized attorney. No fractional shares will be issued upon any
conversion.

         8.       Any Notes called for redemption, unless surrendered for
conversion on or before the close of business on the date fixed for redemption,
may be deemed to be purchased from the Holder of such Notes at an amount equal
to the applicable Redemption Price, by one or more investment bankers or other
purchasers who may agree with the Company to purchase such Notes from the
Holders thereof and convert them into Common Stock of the Company and to make
payment for such Notes as aforesaid to the Trustee in trust for such Holders.

                                       63
<PAGE>   129

         9.       Upon due presentment for registration of transfer of this Note
at the office or agency of the Company in _________________________ or at the
option of the Holder of this Note, at the Corporate Trust Office, a new Note or
Notes of authorized denominations for an equal aggregate principal amount will
be issued to the transferee in exchange thereof, subject to the limitations
provided in the Indenture, without charge except for any tax or other
governmental charge imposed in connection therewith.

         10.      The Company, the Trustee, any authenticating agency, any
paying agent, any conversion agent and any Registrar may deem and treat the
registered Holder hereof as the absolute owner of this Note (whether or Note
this Note shall be overdue and notwithstanding any notation of ownership or
other writing hereon), for the purpose of receiving payment hereof, or on
account hereof, for the conversion hereof and for all other purposes, and
neither the Company nor the Trustee nor any other authenticating agent nor any
paying agent nor any other conversion agent nor any Registrar shall be affected
by any notice to the contrary. All payments made to or upon the order of such
registered Holder shall, to the extent of the sum or sums paid, satisfy and
discharge liability for monies payable on this Note.

         11.      No recourse for the payment of the principal or interest on
this Note, or for any claim based hereon or otherwise in respect hereof, and no
recourse under or upon any obligation, covenant or agreement of the Company in
the Indenture or any indenture supplemental thereto or in any Note, or because
of the creation of any indebtedness represented thereby, shall be had against
any incorporation, stockholder, employee, agent, officer or director or
subsidiary, as such, past, present or future, of the Company or of any successor
corporation, either directly or through the Company or any successor
corporation, whether by virtue of any constitution, statute or rule of law or by
the enforcement of any assessment or penalty or otherwise, all such liability
being, by the acceptance hereof and as part of the consideration of the issue
hereof, expressly waived and released.

         12.      Terms used in this Note and defined in the Indenture are used
herein as therein defined.

                                       64
<PAGE>   130

                                CONVERSION NOTICE
                       TO: ALTERRA HEALTHCARE CORPORATION


         THE UNDERSIGNED REGISTERED OWNER OF THIS NOTE HEREBY IRREVOCABLY
EXERCISES THE OPTION TO CONVERT THIS NOTE, OR THE PORTION HEREOF (WHICH IS
$1,000 OR AN INTEGRAL MULTIPLE THEREOF) BELOW DESIGNATED, TOGETHER WITH ANY
ACCRUED BUT UNPAID INTEREST THEREON, INTO SHARES OF COMMON STOCK OF ALTERRA
HEALTHCARE CORPORATION IN ACCORDANCE WITH THE TERMS OF THE INDENTURE REFERRED TO
IN THIS NOTE, AND DIRECTS THAT THE SHARES ISSUABLE AND DELIVERABLE UPON SUCH
CONVERSION, AND ANY NOTES REPRESENTING ANY UNCONVERTED PRINCIPAL AMOUNT HEREOF,
BE ISSUED AND DELIVERED TO THE REGISTERED HOLDER HEREOF UNLESS A DIFFERENT NAME
HAS BEEN INDICATED BELOW. IF SHARES OR ANY PORTION OF THIS NOTE NOT CONVERTED
ARE TO BE ISSUED IN THE NAME OF A PERSON OTHER THAN THE UNDERSIGNED, THE
UNDERSIGNED WILL CHECK THE APPROPRIATE BOX BELOW AND PAY ALL TRANSFER TAXES
PAYABLE WITH RESPECT THERETO. ANY AMOUNT REQUIRED TO BE PAID TO THE UNDERSIGNED
ON ACCOUNT OF INTEREST ACCOMPANIES THIS NOTE.

DATED:_______________________________

                                    --------------------------------------------


                                    --------------------------------------------
                                    SIGNATURE(S)

                                    SIGNATURE(S) MUST BE GUARANTEED BY AN
                                    ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCK
                                    BROKERS, SAVINGS AND LOAN ASSOCIATIONS AND
                                    CREDIT UNIONS) WITH MEMBERSHIP IN AN
                                    APPROVED SIGNATURE GUARANTEE MEDALLION
                                    PROGRAM PURSUANT TO SECURITIES AND EXCHANGE
                                    COMMISSION RULE 17AD-15 IF SHARES OF COMMON
                                    STOCK ARE TO BE ISSUED, OR NOTES TO BE
                                    DELIVERED, OTHER THAN TO AND IN THE NAME OF
                                    THE REGISTERED HOLDER.



                                    --------------------------------------------
                                    SIGNATURE GUARANTEE


                                       65
<PAGE>   131


FILL IN FOR REGISTRATION OF SHARES OF COMMON STOCK IF TO BE ISSUED, AND NOTES IT
TO BE DELIVERED, OTHER THAN TO AND IN THE NAME OF THE REGISTERED HOLDER:


- ---------------------------------------
(NAME)

- ---------------------------------------
(STREET ADDRESS)

- ---------------------------------------
(CITY, STATE AND ZIP CODE)

- ---------------------------------------

PLEASE PRINT NAME AND ADDRESS

                                             PRINCIPAL AMOUNT TO BE CONVERTED
                                             (IF LESS THAN ALL): $___________


                                             ---------------------------------
                                             SOCIAL SECURITY OR OTHER TAXPAYER
                                             IDENTIFICATION NUMBER

                                       66
<PAGE>   132

                                   ASSIGNMENT

FOR VALUE RECEIVED ___________________ HEREBY SELL(S), ASSIGN(S) AND TRANSFER(S)
UNTO

- --------------------------------------------------------------------------------
(PLEASE INSERT NAME, SOCIAL SECURITY OR OTHER TAXPAYER IDENTIFICATION NUMBER OF
ASSIGNEE) THE WITHIN NOTE, AND HEREBY IRREVOCABLY CONSTITUTES AND APPOINTS

- --------------------------------------------------------------------------------
ATTORNEY TO TRANSFER THE SAID NOTE ON THE BOOKS OF THE COMPANY, WITH POWER OF
SUBSTITUTION IN THE PREMISES.

         IN CONNECTION WITH ANY TRANSFER OF THE WITHIN NOTE WITHIN TWO YEARS OF
THE DATE OF ORIGINAL ISSUANCE OF SUCH NOTE, THE UNDERSIGNED CONFIRMS THAT SUCH
NOTE IS BEING TRANSFERRED:

                  [ ]      TO ALTERRA HEALTHCARE CORPORATION OR A SUBSIDIARY
                           THEREOF; OR

                  [ ]      TO AN INSTITUTIONAL ACCREDITED INVESTOR PURSUANT TO
                           AND IN COMPLIANCE WITH THE SECURITIES ACT OF 1933, AS
                           AMENDED; OR

                  [ ]      PURSUANT TO AND IN COMPLIANCE WITH RULE 144 UNDER THE
                           SECURITIES ACT OF 1933, AS AMENDED;

AND UNLESS THE BOX BELOW IS CHECKED, THE UNDERSIGNED CONFIRMS THAT SUCH NOTE IS
NOT BEING TRANSFERRED TO AN "AFFILIATE" OF THE COMPANY AS DEFINED IN RULE 144
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (AN "AFFILIATE").

                  [ ]      THE TRANSFEREE IS AN AFFILIATE OF THE COMPANY;


                                       67
<PAGE>   133



DATED:_______________________

                                    --------------------------------------------


                                    --------------------------------------------
                                    SIGNATURE(S)

                                    SIGNATURE(S) MUST BE GUARANTEED BY AN
                                    ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCK
                                    BROKERS, SAVINGS AND LOAN ASSOCIATIONS AND
                                    CREDIT UNIONS) WITH MEMBERSHIP IN AN
                                    APPROVED SIGNATURE GUARANTEE MEDALLION
                                    PROGRAM PURSUANT TO SECURITIES AND EXCHANGE
                                    COMMISSION RULE 17AD-15 IF SHARES OF COMMON
                                    STOCK ARE TO BE ISSUED, OR NOTES TO BE
                                    DELIVERED, OTHER THAN TO AND IN THE NAME OF
                                    THE REGISTERED HOLDER.


                                    --------------------------------------------
                                    SIGNATURE GUARANTEE

                                       68
<PAGE>   134

                                                                       EXHIBIT B

                                 [INSERT LEGEND]

                         ALTERRA HEALTHCARE CORPORATION.

        SERIES B 9.75% CONVERTIBLE SENIOR PAY-IN-KIND DEBENTURE DUE 2007

                            No. _______ CUSIP [_____]


         ALTERRA HEALTHCARE CORPORATION, a corporation duly organized and
validly existing under the laws of the State of Delaware (herein called the
"Company"), which term includes any successor corporation under the indenture
referred to on the reverse hereof, for value received hereby promises to pay to
_____________ or registered assigns, the principal sum of [___________
($____________)] on _______________, 2007, at the office or agency of the
Company maintained for that purpose in __________, _____________, or, at the
option of the Holder of this Note, at the Corporate Trust Office, in such coin
or currency of the United States of America as at the time of payment shall be
legal tender for the payment of public and private debts, and to pay interest,
semi-annually on July 1 and January 1 of each year, commencing July 1, 2000, on
said principal sum at said office or agency, in like coin or currency or
securities, as set forth in the Indenture, at the rate per annum of 9.75%, as
adjusted from time to time as set forth in the Indenture, from the date of this
Note. The interest payable on this Note pursuant to the Indenture on any July 1
or January 1 will be paid to the person in whose name this Note (or one or more
predecessor Notes is registered at the close of business on the record date,
which shall be the June 15 or December 15 (whether or not a Business Day) next
preceding such July 1 or January 1, as provided in the Indenture provided that
any such interest not punctually paid or duly provided for shall be payable as
provided in the Indenture.

         Reference is made to the further provisions of this Note set forth on
the reverse hereof, including, without limitation, provisions giving the Holder
of this Note the right to convert this Note into Series B Preferred Stock of the
Company on the terms and subject to the limitations referred to on the reverse
hereof and as more fully specified in the Indenture. Such further provisions
shall for all purposes have the same effect as though fully set forth at this
place.

         This Note shall be deemed to be a contract made under the laws of the
State of New York, and for all purposes shall be construed in accordance with
and governed by the laws of said State.

         This Note shall not be valid or become obligatory for any purpose until
the certificate of authentication hereon shall have been manually signed by the
Trustee or a duly authorized authenticating agent under the Indenture.


                                       69
<PAGE>   135

         IN WITNESS WHEREOF, the Company has caused this Note to be duly
executed under its corporate seal.


DATED:  ____________, 2000

ATTEST:  ALTERRA HEALTHCARE CORPORATION



By:
   --------------------------------------
Title:


[SEAL]


TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Notes described in the within-named Indenture.

[TRUSTEE], as Trustee



By:
   --------------------------------------
   Name:
   Title:


                                       70
<PAGE>   136

                            [FORM OF REVERSE OF NOTE]

                         ALTERRA HEALTHCARE CORPORATION

        SERIES B 9.75% CONVERTIBLE SENIOR PAY-IN-KIND DEBENTURE DUE 2007


         1. This Note is one of a duly authorized issue of Notes of the Company,
designated as its Series B 9.75% Convertible Senior Pay-In-Kind Debentures due
2007 (herein called the "Notes"), limited to aggregate principal amount of
$___________ (except for Notes issued as payment of dividends pursuant to the
Indenture) issued or to be issued under and pursuant to an indenture dated as of
__________, 2000 (herein called the "Indenture"), between the Company and
[TRUSTEE], as trustee (herein called the "Trustee"), to which Indenture and all
indentures supplemental thereto reference is hereby made for a description of
the rights, limitations of rights, obligations, duties and immunities thereunder
of the Trustee, the Company and the Holders.

         2. In case an Event of Default, as defined in the Indenture, shall have
occurred and be continuing, the principal of and accrued interest on all Notes
may be declared, and upon said declaration shall become, due and payable, in the
manner, with the effect and subject to the conditions provided in the Indenture.

         3. The Indenture contains provisions permitting the Company and the
Trustee, with the consent of the Holders of not less than a majority in
aggregate principal amount of the Notes as the time outstanding, evidenced as in
the Indenture provided, to execute supplemental indentures adding any provisions
to or changing in any manner or eliminating any of the provisions of the
Indenture or of any supplemental indenture or modifying in any manner the rights
of the Holders provided, however, that no such supplemental indenture shall (i)
extend the fixed maturity of any Note, or reduce the rate or extend the time of
payment of interest thereon, or reduce the principal amount thereof, or reduce
any amount payable on redemption thereof , or impair the right of any Noteholder
to institute suit for the payment thereof, or make the principal thereof payable
in any coin or currency other than that provided in the Note, or modify the
provisions of the Indenture with respect to the subordination of the Notes in a
manner adverse to the Holders in any material respect, or impair the right to
convert the Notes into Series B Preferred Stock in any material respect, without
the consent of the Holder of each Note so affected or (ii) reduce the aforesaid
percentage of Notes, the Holders of which are required to consent to any such
supplemental indenture, without the consent of the Holders of all Notes then
outstanding. It is also provided in the Indenture that the Holders of a majority
in aggregate principal amount of the Notes at the time outstanding may on behalf
of the Holders of all of the Notes waive any past default or Event of Default
under the Indenture and its consequences except (i) a default in the payment of
interest on, or the principal of, the Notes, (ii) a failure by the Company to
convert any Notes into Series B Preferred Stock, (iii) a default in the payment
of the Redemption Price pursuant to Article III or (iv) a default in respect of
a covenant or provisions which under Article XI cannot be modified or amended
without the consent of the Holders of all Notes then outstanding. Any such
consent or waiver by the Holder of this Note


                                       71
<PAGE>   137

(unless revoked as provided in the Indenture) shall be conclusive and binding
upon such Holder and upon all future Holders and owners of this Note and any
Notes which may be issued in exchange or substitute hereof, irrespective of
whether or not any notation thereof is made upon this Note or such other Notes.

         4. No reference herein to the Indenture and no provision of this Note
or of the Indenture shall alter or impair the obligation of the Company, which
is absolute and unconditional, to pay the principal of and interest on this Note
at the place, at the respective times, at the rate and in the coin or currency
or securities herein prescribed.

         5. The Notes are issuable in registered form without coupons in minimum
denominations of $1,000 and any integral multiple of $1,000. At the office or
agency of the Company referred to on the face hereof, and in the manner and
subject to the limitations provided in the Indenture, without payment of any
service charge but with payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in connection with any registration or
exchange of Notes, Notes may be exchanged for a like aggregate principal amount
of Notes of other authorized denominations.

         6. The Notes will not be redeemable at the option of the Company prior
to _____________, 2003. At any time after ____________, 2003, and prior to
maturity, the Notes may be redeemed at the option of the Company from time to
time, on such notice, on such conditions and at such price as provided in the
Indenture.

         7. Subject to the provisions of the Indenture, the Holder hereof has
the right, at its option, at any time prior to the close of business on the
maturity date, subject to prior redemption, or, as to all or any portion hereof
called for redemption, prior to the close of business on the fifth Business day
preceding the date fixed for redemption (unless the Company shall default in
payment due upon redemption thereof), to convert the principal hereof or any
portion of such principal which is $1,000 or an integral multiple thereof, (and
any accrued but unpaid dividends thereon) into that number of shares of the
Company's Series B Preferred Stock obtained by dividing the principal amount of
this Note or portion thereof to be converted (together with any accrued but
unpaid dividends thereon) by the Conversion Price of $_____________, as such
Conversion Price is adjusted from time to time as provided in the Indenture,
upon surrender of this Note, together with a conversion notice as provided in
the Indenture, to the Company at the office or agency of the Company maintained
for that purpose in ______________________, or at the option of such Holder, the
Corporate Trust Office, and, unless the shares issuable on conversion are to be
issued in the same name as this Note, duly endorsed by, or accompanied by
instruments of transfer in form satisfactory to the Company duly executed by,
the Holder or by his duly authorized attorney. No fractional shares will be
issued upon any conversion.

         8. Any Notes called for redemption, unless surrendered for conversion
on or before the close of business on the date fixed for redemption, may be
deemed to be purchased from the Holder of such Notes at an amount equal to the
applicable Redemption Price, by one or more investment bankers or other
purchasers who may agree with the Company to purchase such Notes from the
Holders thereof and convert them into Series B Preferred Stock of the Company


                                       72
<PAGE>   138

and to make payment for such Notes as aforesaid to the Trustee in trust for such
Holders.

         9. Upon due presentment for registration of transfer of this Note at
the office or agency of the Company in _________________________ or at the
option of the Holder of this Note, at the Corporate Trust Office, a new Note or
Notes of authorized denominations for an equal aggregate principal amount will
be issued to the transferee in exchange thereof, subject to the limitations
provided in the Indenture, without charge except for any tax or other
governmental charge imposed in connection therewith.

         10. The Company, the Trustee, any authenticating agency, any paying
agent, any conversion agent and any Registrar may deem and treat the registered
Holder hereof as the absolute owner of this Note (whether or Note this Note
shall be overdue and notwithstanding any notation of ownership or other writing
hereon), for the purpose of receiving payment hereof, or on account hereof, for
the conversion hereof and for all other purposes, and neither the Company nor
the Trustee nor any other authenticating agent nor any paying agent nor any
other conversion agent nor any Registrar shall be affected by any notice to the
contrary. All payments made to or upon the order of such registered Holder
shall, to the extent of the sum or sums paid, satisfy and discharge liability
for monies payable on this Note.

         11. No recourse for the payment of the principal or interest on this
Note, or for any claim based hereon or otherwise in respect hereof, and no
recourse under or upon any obligation, covenant or agreement of the Company in
the Indenture or any indenture supplemental thereto or in any Note, or because
of the creation of any indebtedness represented thereby, shall be had against
any incorporation, stockholder, employee, agent, officer or director or
subsidiary, as such, past, present or future, of the Company or of any successor
corporation, either directly or through the Company or any successor
corporation, whether by virtue of any constitution, statute or rule of law or by
the enforcement of any assessment or penalty or otherwise, all such liability
being, by the acceptance hereof and as part of the consideration of the issue
hereof, expressly waived and released.

         12. Terms used in this Note and defined in the Indenture are used
herein as therein defined.


                                       73
<PAGE>   139

                                CONVERSION NOTICE
                       TO: ALTERRA HEALTHCARE CORPORATION


         THE UNDERSIGNED REGISTERED OWNER OF THIS NOTE HEREBY IRREVOCABLY
EXERCISES THE OPTION TO CONVERT THIS NOTE, OR THE PORTION HEREOF (WHICH IS
$1,000 OR AN INTEGRAL MULTIPLE THEREOF) BELOW DESIGNATED, TOGETHER WITH ANY
ACCRUED BUT UNPAID INTEREST THEREON, INTO SHARES OF SERIES B PREFERRED STOCK OF
ALTERRA HEALTHCARE CORPORATION IN ACCORDANCE WITH THE TERMS OF THE INDENTURE
REFERRED TO IN THIS NOTE, AND DIRECTS THAT THE SHARES ISSUABLE AND DELIVERABLE
UPON SUCH CONVERSION, AND ANY NOTES REPRESENTING ANY UNCONVERTED PRINCIPAL
AMOUNT HEREOF, BE ISSUED AND DELIVERED TO THE REGISTERED HOLDER HEREOF UNLESS A
DIFFERENT NAME HAS BEEN INDICATED BELOW. IF SHARES OR ANY PORTION OF THIS NOTE
NOT CONVERTED ARE TO BE ISSUED IN THE NAME OF A PERSON OTHER THAN THE
UNDERSIGNED, THE UNDERSIGNED WILL CHECK THE APPROPRIATE BOX BELOW AND PAY ALL
TRANSFER TAXES PAYABLE WITH RESPECT THERETO. ANY AMOUNT REQUIRED TO BE PAID TO
THE UNDERSIGNED ON ACCOUNT OF INTEREST ACCOMPANIES THIS NOTE.

DATED:
      -------------------------


                                    -------------------------------------------

                                    -------------------------------------------
                                    SIGNATURE(S)

                                    SIGNATURE(S) MUST BE GUARANTEED BY AN
                                    ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCK
                                    BROKERS, SAVINGS AND LOAN ASSOCIATIONS AND
                                    CREDIT UNIONS) WITH MEMBERSHIP IN AN
                                    APPROVED SIGNATURE GUARANTEE MEDALLION
                                    PROGRAM PURSUANT TO SECURITIES AND EXCHANGE
                                    COMMISSION RULE 17AD-15 IF SHARES OF SERIES
                                    B PREFERRED STOCK ARE TO BE ISSUED, OR NOTES
                                    TO BE DELIVERED, OTHER THAN TO AND IN THE
                                    NAME OF THE REGISTERED HOLDER.


                                    -------------------------------------------
                                    SIGNATURE GUARANTEE


                                       74
<PAGE>   140

FILL IN FOR REGISTRATION OF SHARES OF SERIES B PREFERRED STOCK IF TO BE ISSUED,
AND NOTES IT TO BE DELIVERED, OTHER THAN TO AND IN THE NAME OF THE REGISTERED
HOLDER:



- -----------------------------
(NAME)


- -----------------------------
(STREET ADDRESS)


- -----------------------------
(CITY, STATE AND ZIP CODE)

PLEASE PRINT NAME AND ADDRESS

                                    PRINCIPAL AMOUNT TO BE CONVERTED (IF LESS
                                    THAN ALL): $___________


                                    -----------------------------------------
                                    SOCIAL SECURITY OR OTHER TAXPAYER
                                    IDENTIFICATION NUMBER


                                       75
<PAGE>   141

                                   ASSIGNMENT

FOR VALUE RECEIVED ___________________ HEREBY SELL(S), ASSIGN(S) AND TRANSFER(S)
UNTO


_______________________________________________________________________________

(PLEASE INSERT NAME, SOCIAL SECURITY OR OTHER TAXPAYER IDENTIFICATION NUMBER OF
ASSIGNEE) THE WITHIN NOTE, AND HEREBY IRREVOCABLY CONSTITUTES AND APPOINTS
_______________________________________________________________________________
ATTORNEY TO TRANSFER THE SAID NOTE ON THE BOOKS OF THE COMPANY, WITH POWER OF
SUBSTITUTION IN THE PREMISES.

         IN CONNECTION WITH ANY TRANSFER OF THE WITHIN NOTE WITHIN TWO YEARS OF
THE DATE OF ORIGINAL ISSUANCE OF SUCH NOTE, THE UNDERSIGNED CONFIRMS THAT SUCH
NOTE IS BEING TRANSFERRED:

                  [ ]      TO ALTERRA HEALTHCARE CORPORATION OR A SUBSIDIARY
                           THEREOF; OR

                  [ ]      TO AN INSTITUTIONAL ACCREDITED INVESTOR PURSUANT TO
                           AND IN COMPLIANCE WITH THE SECURITIES ACT OF 1933, AS
                           AMENDED; OR

                  [ ]      PURSUANT TO AND IN COMPLIANCE WITH RULE 144 UNDER THE
                           SECURITIES ACT OF 1933, AS AMENDED;

AND UNLESS THE BOX BELOW IS CHECKED, THE UNDERSIGNED CONFIRMS THAT SUCH NOTE IS
NOT BEING TRANSFERRED TO AN "AFFILIATE" OF THE COMPANY AS DEFINED IN RULE 144
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (AN "AFFILIATE").

                  [ ]      THE TRANSFEREE IS AN AFFILIATE OF THE COMPANY;


                                       76

<PAGE>   142

DATED:
      --------------------------


                                    -------------------------------------------

                                    -------------------------------------------
                                    SIGNATURE(S)

                                    SIGNATURE(S) MUST BE GUARANTEED BY AN
                                    ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCK
                                    BROKERS, SAVINGS AND LOAN ASSOCIATIONS AND
                                    CREDIT UNIONS) WITH MEMBERSHIP IN AN
                                    APPROVED SIGNATURE GUARANTEE MEDALLION
                                    PROGRAM PURSUANT TO SECURITIES AND EXCHANGE
                                    COMMISSION RULE 17AD-15 IF SHARES OF SERIES
                                    B PREFERRED STOCK ARE TO BE ISSUED, OR NOTES
                                    TO BE DELIVERED, OTHER THAN TO AND IN THE
                                    NAME OF THE REGISTERED HOLDER.


                                    -------------------------------------------
                                    SIGNATURE GUARANTEE


                                       77
<PAGE>   143

                                                                       EXHIBIT C

                           AMENDED AND RESTATED BYLAWS
                                       OF
                         ALTERRA HEALTHCARE CORPORATION
                    (F/K/A ALTERNATIVE LIVING SERVICES, INC.)

                             A Delaware Corporation

                           (effective ________, 2000)


                                    ARTICLE 1
                                     OFFICES

         Section 1.1 Registered office. The registered office of the Corporation
in the State of Delaware shall be at Corporation Trust Center, 1209 Orange
Street, Wilmington, DE 19801. The name of the Corporation's registered agent at
such address shall be CT Corporation System.

         Section 1.2 Other offices. The Corporation may also have offices at
such other places, both within and without the State of Delaware, as the Board
of Directors (the "Board") may from time to time determine or the business of
the Corporation may require.

                                    ARTICLE 2
                            MEETINGS OF STOCKHOLDERS


         Section 2.1 Place and Time of Meetings. An annual meeting of the
stockholders shall be held for the purpose of electing directors and conducting
such other business as may properly come before the meeting. The date, time and
place of the annual meeting, either within or without the State of Delaware,
shall be determined by resolution of the Board of Directors. Special meetings of
stockholders for any other purpose may be held at such time and place, within or
without the State of Delaware, as shall be stated in the notice of the meeting
or in a duly executed waiver of notice thereof. Special meetings of the
stockholders may be called by the Chief Executive Officer for any purpose and
shall be called by the Secretary if directed by the Board of Directors.

         Section 2.2 Notice of Meetings. Except as otherwise required by law,
notice of each meeting of the stockholders, whether annual or special, shall be
given not less than ten (10) nor more than sixty (60) days before the date of
the meeting to each stockholder of record entitled to vote at such meeting by
delivering a written notice thereof to the stockholder personally, or by
depositing such notice in the United States mail, in a postage prepaid envelope,
directed to the stockholder at stockholder's post office address furnished by
stockholder to the Secretary of the Corporation for such purpose or, if
stockholder has not furnished to the Secretary stockholder's address for such
purpose, then at stockholder's post office address last known to the Secretary,
or by transmitting a notice thereof to stockholder at such address by telegraph,
cable or facsimile


<PAGE>   144

telecommunication. Notice shall be deemed given upon delivery (if by hand) or
upon deposit in the mail (if by mail) or upon stockholder's receipt (if by
telegraph, cable or facsimile).

         Except as otherwise expressly required by law, no publication of any
notice of a meeting of the stockholders shall be required. Every notice of a
meeting of the stockholders shall state the place, date and hour of the meeting,
and, in the case of a special meeting, shall also state the purpose or purposes
for which the meeting is called. Notice of any meeting of stockholders shall not
be required to be given to any stockholder who waives such notice, and such
notice shall be deemed waived by any stockholder who attends such meeting in
person or by proxy, except by a stockholder who attends such meeting for the
express purpose of objecting, at the beginning of the meeting, to the
transaction of any business because the meeting is not lawfully called or
convened.

         Section 2.3 Adjournments. Any meeting of stockholders, annual or
special, may adjourn from time to time to reconvene at the same or some other
place and notice need not be given of any such adjourned meeting if the time and
place thereof are announced at the meeting at which the adjournment is taken,
unless such notice is otherwise expressly required by law or hereunder. At the
adjourned meeting, the Corporation may transact any business that might have
been transacted at the original meeting. If the adjournment is for more than 30
days, or if after the adjournment a new record date is fixed for the adjourned
meeting, the notice of the adjourned meeting shall be given to each stockholder
of record entitled to vote at the adjourned meeting. At the adjourned meeting,
the Corporation may transact any business that might have been transacted at the
original meeting.

         Section 2.4 List of Stockholders. The Secretary shall make, at least
ten (10) days before every meeting of stockholders, a complete list of the
stockholders entitled to vote at such meeting, arranged in alphabetical order
and specifying the address and the number of shares registered in the name of
each stockholder. Such list shall be open to the examination of any stockholder,
for any purpose germane to the meeting, during ordinary business hours, for a
period of at least ten (10) days prior to the meeting, either at a place within
the city where the meeting is to be held, which place shall be specified in the
notice of the meeting or, if not so specified, at the place where the meeting is
to be held. The list shall also be produced and kept at the place of the meeting
during the whole time thereof and may be inspected by any stockholder who is
present. Upon the willful neglect or refusal of the Directors to produce such a
list at any meeting for the election of Directors, they shall be ineligible for
election to any office at such meeting. The stock ledger shall be the only
evidence of which stockholders are entitled to examine the stock ledger, the
list required by this section or the books of the Corporation, or to vote in
person or by proxy at any meeting of stockholders.

         Section 2.5 Quorum. Except as otherwise provided by law or the
Certificate of Incorporation, at each meeting of stockholders the presence in
person or by proxy of the holders of shares of stock having a majority of the
votes that could be cast by the holders of all outstanding shares of stock of
all classes of capital stock entitled to vote at the meeting shall be necessary
and sufficient to constitute a quorum. If a quorum is not present, the holders
of the shares present in person or represented by proxy at the meeting, and
entitled to vote thereat, shall


                                       2
<PAGE>   145

have the power to adjourn the meeting to another time and/or place by the
affirmative vote of the holders of a majority of such shares.

         Section 2.6 Voting; Proxies.

                           (a) At each meeting of the stockholders, each
                  stockholder shall be entitled to vote in person or by proxy
                  each share or fractional share of the stock of the Corporation
                  having voting rights on the matter in question and held by the
                  stockholder and registered in the stockholder's name on the
                  books of the Corporation:

                                    (i) on the date fixed pursuant to Section
                           7.5 of these Bylaws as the record date for the
                           determination of stockholders entitled to notice of
                           and to vote at such meeting; or

                                    (ii) if no such record date is so fixed,
                           then (a) at the close of business on the day next
                           preceding the day on which notice of the meeting is
                           given or (b) if notice of the meeting is waived, at
                           the close of business on the day next preceding the
                           day on which the meeting is held.

                           (b) Unless otherwise provided in a shareholders
                  agreement, persons holding stock of the Corporation in a
                  fiduciary capacity shall be entitled to vote such stock.
                  Persons whose stock is pledged shall be entitled to vote such
                  shares, unless in the pledgor's transfer on the books of the
                  Corporation he expressly empowered the pledgee to vote such
                  shares, in which case only the pledgee or the pledgee's proxy
                  may represent and vote such stock. Stock having voting power
                  standing of record in the names of two or more persons,
                  whether fiduciaries, members of a partnership, joint tenants
                  in common, tenants by entirety or otherwise, or with respect
                  to which two or more persons have the same fiduciary
                  relationship, shall be voted in accordance with the provisions
                  of the General Corporation Law of the State of Delaware.

                           (c) Unless otherwise provided in a shareholders
                  agreement, voting rights may be exercised by the stockholder
                  entitled thereto in person or by the stockholder's proxy
                  appointed by an instrument in writing, subscribed by such
                  stockholder or by his attorney thereunto authorized and
                  delivered to the secretary of the meeting; provided, however,
                  that no proxy shall be voted or acted upon after three years
                  from its date, unless that proxy shall provide for a longer
                  period. A duly executed proxy shall be irrevocable if it so
                  states and if, and only for so long as, it is coupled with an
                  interest sufficient in law to support an irrevocable power. A
                  stockholder who may have given a proxy prior to any meeting
                  shall not, solely by attending such meeting, revoke the same
                  unless he notifies the secretary of the meeting of his intent
                  to revoke the proxy, in writing, prior to the voting of the
                  proxy. At any meeting of the stockholders at which a quorum is
                  present, all matters (except as otherwise provided in the
                  Certificate of Incorporation, in these Bylaws or by law) shall
                  be decided by the vote of a


                                       3
<PAGE>   146

                  majority in voting interest of the stockholders present in
                  person or by proxy and entitled to vote thereat and thereon.
                  Voting at any meeting of the stockholders on any question need
                  not be by ballot, unless so directed by the chairman of the
                  meeting. On a vote by ballot each ballot shall be signed by
                  the stockholder voting, or by his proxy, if there be such
                  proxy, and it shall state the number of shares voted.

         Section 2.7 Conduct of Meetings. Meetings of stockholders shall be
presided over by the Chairman of the Board, if any, or in his or her absence by
the Chief Executive Officer, or in his or her absence by the President, or in
his or her absence by a Vice President, or in the absence of the foregoing
persons by a Chairman designated by the Board of Directors, or in the absence of
such designation by a Chairman chosen at the meeting by the stockholders
attending. The Corporation's Secretary shall act as secretary of the meeting,
but in his or her absence the Chairman of the meeting may appoint any person to
act as secretary of the meeting.

                                    ARTICLE 3
                               BOARD OF DIRECTORS


         Section 3.1 General Powers. The property, business and affairs of the
Corporation shall be managed by the Board of Directors.

         Section 3.2 Number and Term of Office. For so long as the Senior
Securities Condition (hereinafter defined) is met, the Board of Directors shall
be comprised of nine (9) directors, four (4) of whom shall be elected by the
holders of the Series A 9.75% Cumulative Convertible Pay-in-Kind Preferred Stock
(the "Series A Stock") of the Corporation (the "Series A Directors"), and five
(5) of whom shall be elected by the holders of the Common Stock, $.01 par value
(the "Common Stock") of the Corporation (the "At-Large Directors"). At such time
as the Senior Securities Condition is no longer met, the Board of Directors
shall be comprised of nine (9) directors elected by the holders of the Common
Stock, all of whom shall be At-Large Directors. Directors need not be
stockholders of the Corporation. The directors of the Corporation shall hold
office until their successors shall have been duly elected or appointed and
shall qualify or until their resignation or removal in the manner hereinafter
provided.

         Section 3.3 Election of Directors. At each annual meeting of the
stockholders, the holders of the Common Stock, voting together as a class, shall
elect the At-Large Directors and, for so long as the Senior Securities Condition
is met, the holders of the Series A Stock shall elect the Series A Directors,
each of whom shall hold office for a term of one year or until a successor is
elected and qualified.

         Section 3.4 Resignations; Removal. Any director of the Corporation may
resign at any time by giving written notice to the Board or to the Secretary of
the Corporation. Any such resignation shall take effect at the time specified
therein or, if the time is not specified, immediately upon its receipt by the
Board or Secretary. Unless otherwise specified in the notice, the acceptance of
such resignation shall not be necessary to make it effective. Any director may
be removed at any time, with or without cause, by the holders of a majority of
shares of (i)


                                       4
<PAGE>   147

Common Stock, in the case of an At-Large Director and (ii) Series A Stock, in
the case of a Series A Director.

         Section 3.5 Vacancies. Any vacancy in the Board, whether because of
death, resignation, disqualification, an increase in the number of directors or
any other cause, may be filled by the remaining At-Large Directors (in the case
of an At-Large Director), the remaining Series A Directors (in the case of a
Series A Director) or by the holders of the Common Stock (in the case of an
At-Large Director), or the holders of the Series A Stock (in the case of a
Series A Director), in each case by a plurality of the votes cast at a meeting
of such stockholders. Each director so chosen to fill a vacancy shall hold
office until his successor shall have been elected and shall qualify or until he
shall resign or shall have been removed in the manner provided herein.

         Section 3.6 Place of Meeting, Etc. The Board may hold any of its
meetings at such place or places within or without the State of Delaware as the
Board may from time to time by resolution designate or as shall be designated by
the person or persons calling the meeting or in the notice or a waiver of notice
of any such meeting.

         Directors may participate in any regular or special meeting of the
Board by means of conference telephone or similar communications equipment
pursuant to which all persons participating in the meeting of the Board can hear
each other, and such participation shall constitute presence in person at such
meeting.

         Section 3.7 Annual Meeting. The Board shall meet as soon as practicable
after each annual election of directors, and notice of such annual meeting shall
not be required.

         Section 3.8 Regular Meetings. Regular meetings of the Board may be held
at such times as the Board shall from time to time by resolution determine. If
any day fixed for a regular meeting shall be a legal holiday at the place where
the meeting is to be held, then the meeting shall be held at the same hour and
place on the next succeeding business day not a legal holiday. Except as
required by law, notice of regular meetings need not be given.

         Section 3.9 Special Meetings. Special meetings of the Board shall be
held whenever called by the Chairman of the Board, Chief Executive Officer or a
majority of the authorized number of directors. Except as otherwise provided by
law or by these Bylaws, notice of the time and place of each such special
meeting shall be mailed to each director, addressed to him at his residence or
usual place of business, at least three (3) days before the day on which the
meeting is to be held, or shall be sent to him at such place by facsimile
telecommunication, telegraph or cable or be delivered personally not less than
forty-eight (48) hours before the time at which the meeting is to be held.
Except where otherwise required by law or by these Bylaws, notice of the purpose
of a special meeting need not be given. Notice of any meeting of the Board shall
not be required to be given to any director who is present at such meeting other
than a director who attends such meeting for the express purpose of objecting,
at the beginning of the meeting, to the transaction of any business because the
meeting is not lawfully called or convened.


                                       5
<PAGE>   148

         Section 3.10 Quorum and Manner of Acting. Except as otherwise provided
in these Bylaws (including, without limitation, Section 3.11 hereof) or by law,
the presence of a majority of the authorized number of directors shall be
required to constitute a quorum for the transaction of business at any meeting
of the Board, and all matters shall be decided at any such meeting, a quorum
being present, by the affirmative votes of a majority of the directors present.
If no quorum exists, a majority of directors present at any meeting may adjourn
the same from time to time until a quorum is present. Notice of any adjourned
meeting need not be given.

         Section 3.11 Special Majority Approval. For so long as (A) in the
aggregate, in excess of $50 million of face amount (or stated value, as
applicable) of (i) Series A Stock, (ii) Series A 9.75% Pay-in-Kind Convertible
Debentures, and (iii) Series B 9.75% Non-Voting, Pay-in-Kind Preferred
Convertible Debentures of the Corporation (collectively, the "Senior
Securities") remain outstanding and (B) any shares of Series A Stock remain
outstanding (this state of affairs referred to herein as the "Senior Securities
Condition"), the following actions of the Corporation or, if applicable, of the
Subsidiaries (hereinafter defined), shall require the approval of at least seven
(7) of the nine (9) members of the Board of Directors (such approval referred to
herein as a "Special Majority"):

                  (i)      The addition, deletion or amendment of any provision
                           in the bylaws or certificate of incorporation of the
                           Corporation or any restatement of the bylaws or
                           certificate of incorporation of the Corporation;

                  (ii)     Any change in the size or structure of the Board of
                           Directors of the Corporation;

                  (iii)    The appointment or election of the Chairman of the
                           Board of the Corporation;

                  (iv)     Adoption of annual operating and capital budgets for
                           the Corporation and its Subsidiaries;

                  (v)      Any borrowings or renewals or extensions of
                           borrowings by the Corporation or Subsidiaries
                           involving, or the establishment of any credit
                           facilities contemplating borrowings of, in excess of
                           $5,000,000;

                  (vi)     Issuance of any capital stock by the Corporation or
                           any Subsidiary that after the event or events
                           described herein will not be a wholly owned
                           Subsidiary ( a "Partial Sub") or of any security
                           convertible into, or exchangeable for, shares of
                           capital stock of the Corporation or any Partial Sub
                           or the issuance by the Corporation or any Partial Sub
                           of any option, warrant or right to purchase any such
                           capital stock or securities or of any arrangement
                           that provides a share or interest in their capital or
                           earnings, excluding (i) the approval of employee
                           stock option plans or the grant of options thereunder
                           to employees; (ii) the issuance of the Series A
                           Preferred Stock, the Series A 9.75% Convertible
                           Pay-in-Kind Debentures ("Series A Debentures"), and
                           the Series B 9.75% Convertible Pay-in-Kind Debentures
                           (the "Series B Debentures") pursuant to the Purchase


                                       6
<PAGE>   149

                           Agreement dated as of April __, 2000 related thereto,
                           as amended; (iii) the issuance of any pay-in-kind
                           dividend or coupon on the Series A Preferred Stock,
                           the Series A Debentures and the Series B Debentures,
                           together with the issuance of any securities upon the
                           conversion, exchange or exercise of any other related
                           right in accordance with the terms thereof (any such
                           securities so issued, the "Derivative Securities");
                           (iv) the issuance of any securities upon the
                           conversion, exchange or exercise of any other related
                           right in accordance with the terms of any Derivative
                           Securities issued; and (v) the issuance of such
                           shares or securities pursuant to the exercise of
                           convertible securities or options outstanding as of
                           the effective date of these Amended and Restated
                           Bylaws or subsequently issued with the approval of a
                           Special Majority;

                  (vii)    The guaranty by the Corporation or any of its
                           Subsidiaries of the debts, liabilities or obligations
                           of any third party (other than the Corporation or any
                           wholly-owned Subsidiary) or the lending by them of
                           funds to any third party, in either case where the
                           amount involved exceeds $5,000,000;

                  (viii)   The declaration of dividends on any class of the
                           capital stock of the Corporation or the redemption of
                           any shares of capital stock of the Corporation
                           excluding dividends payable on the Series A Preferred
                           Stock and excluding any mandatory redemption of the
                           Series A Preferred Stock or any capital stock that
                           are Derivative Securities;

                  (ix)     The establishment of committees of the Board of
                           Directors of the Corporation and the election or
                           appointment of members of all committees of the Board
                           of Directors of the Corporation;

                  (x)      Any matter or series of related matters involving
                           capital expenditures or commitments by the
                           Corporation and Subsidiaries exceeding $5,000,000 in
                           the aggregate;

                  (xi)     Any disposition by the Corporation or any Subsidiary
                           of assets resulting in net proceeds to the
                           Corporation and Subsidiaries of $5,000,000 or more or
                           a loss of $2,000,000 or more;

                  (xii)    Any merger, consolidation, share exchange, business
                           combination, recapitalization or other similar
                           transaction to which the Corporation is a party or in
                           which capital stock of the Corporation would be
                           issued, converted or otherwise modified;

                  (xiii)   The taking or instituting of proceedings for the
                           winding-up, dissolution or liquidation of the
                           Corporation;

                  (xiv)    Any modification of the Corporation's shareholder
                           rights plan; and

                  (xv)     The employment of or termination of any of the Chief
                           Executive Officer, President, Chief Operating Officer
                           or Chief Financial Officer of the


                                       7
<PAGE>   150

                           Corporation, the terms of employment thereof and the
                           approval of the annual compensation and bonuses of
                           such officers.

"Subsidiary" means, for purposes hereof, any corporation, limited partnership,
limited liability company or other business entity in which the Corporation or
one or more of its Subsidiaries or the Corporation and one or more of its
Subsidiaries owns sufficient equity or voting interests to enable it or them (as
a group) ordinarily, in the absence of contingencies, to elect a majority of the
directors (or persons performing similar functions) of such entity, and any
partnership or joint venture if more than a 50% interest in the profits or
capital thereof is owned by the Corporation or one or more of its Subsidiaries
or the Corporation and one or more of its Subsidiaries.

         Section 3.12 Action by Consent. Any action required or permitted to be
taken at any meeting of the Board or of any committee thereof may be taken
without a meeting if a written consent thereto is signed by all members of the
Board or of such committee, as the case may be, and such written consent is
filed with the minutes of the proceedings of the Board or committee.

         Section 3.13 Compensation. The directors shall receive only such
compensation for their services as directors as may be allowed by resolution of
the Board. The Board may also provide that the Corporation shall reimburse each
director for any expense incurred on account of attendance at any meetings of
the Board or committees of the Board. Neither the payment of such compensation
nor the reimbursement of such expenses shall be construed to preclude any
director from serving the Corporation or its subsidiaries in any other capacity
and receiving compensation therefor.

         Section 3.14 Committees. By resolution passed by a Special Majority,
the Board may designate one or more committees. Any such committee, to the
extent provided in the Board's resolution and except as otherwise limited by
law, shall have and may exercise all the powers and authority of the Board in
the management of the business and affairs of the Corporation, and may authorize
the seal of the Corporation to be affixed to all papers requiring it. Any such
committee shall keep written minutes of its meetings and report the same to the
Board at the next regular meeting of the Board. In the absence or
disqualification of a member of a committee and that member's alternate, if the
Board appoints alternates, the member or members thereof present at any meeting
and not disqualified from voting (whether or not the member or members
constitute a quorum) may unanimously appoint another member of the Board to act
at the meeting in the place of any such absent or disqualified member. The
Corporation has elected to be governed by Section 141(c)(2) of the General
Corporation Law of the State of Delaware.

         Section 3.15 Committee Rules. Each committee of the Board of Directors
may elect from its members a chairman of the committee and may fix its own rules
of procedure and shall hold its meetings as provided by such rules, except as
may otherwise be provided by resolution of the Board designating such committee,
but in all cases the presence of at least a majority of the members of such
committee shall be necessary to constitute a quorum.

         The members of each committee of the Board of Directors may participate
in committee proceedings by means of conference telephone or similar
communications equipment by means


                                       8
<PAGE>   151

of which all persons participating in the proceeding can hear each other, and
such participation shall constitute presence in person at such proceedings.

         Section 3.16 Presumption of Assent. A director of the Corporation who
is present at a meeting of the Board of Directors or any committee designated by
the Board at which action on any corporate matter is taken shall be deemed to
have assented to the action taken unless his dissent is entered in the minutes
of the meeting or unless he files his written dissent to such action with the
person acting as the Secretary of the meeting before the adjournment thereof or
forwards such dissent by registered mail to the Secretary of the Corporation
immediately after the adjournment of the meeting. Such right to dissent shall
not apply to a director who voted in favor of such action.

                                    ARTICLE 4
                                    OFFICERS

         Section 4.1 Number. The officers of the Corporation shall be chosen by
the Board and shall consist of a Chairman of the Board, a Chief Executive
Officer, a President, a Secretary, a Treasurer and such other officers and
assistant officers as may be deemed necessary or desirable by the Board of
Directors. Any number of offices may be held by the same person. In its
discretion, the Board of Directors may choose not to fill any office for any
period as it may deem advisable, except the offices of President and Secretary.

         Section 4.2 Election; Term of Office; Qualifications. The officers of
the Corporation, except such officers as may be appointed in accordance with
Section 4.3, shall be elected annually by the Board at the first meeting thereof
held after the election of the Board. Each officer shall hold office until his
successor has been duly chosen and qualifies or until his resignation or removal
in the manner hereinafter provided.

         Section 4.3 Assistants, Agents and Employees, Etc. In addition to the
officers specified in Section 4.1, the Board may appoint such other assistants,
agents and employees as it may deem necessary or advisable, including one or
more Assistant Secretaries, and one or more Assistant Treasurers, each of whom
shall hold office for such period, have such authority and perform such duties
as the Board may from time to time determine. The Board may delegate to any
officer of the Corporation or any committee of the Board the power to appoint,
remove and prescribe the duties of any such assistants, agents or employees.

         Section 4.4 Resignation; Removal. Any officer or agent may resign at
any time upon written notice to the Board or the Secretary of the Corporation.
Any officer or agent elected or appointed by the Board of Directors may be
removed by the Board of Directors whenever in its judgment the best interests of
the Corporation would be served thereby, but such removal shall be without
prejudice to the contract rights, if any, of the person so removed.

         Section 4.5 Vacancies. A vacancy in any office caused by death,
resignation, removal, disqualification or otherwise, may be filled by the Board
for the unexpired portion of the term of that office by a majority vote of the
directors then in office.


                                       9
<PAGE>   152

         Section 4.6 Chairman of the Board ("Chairman"). The Chairman, if one is
elected, shall preside at all meetings of the Board and stockholders; and shall
perform such other duties and have such other powers as the Board may from time
to time prescribe. In addition to the Chief Executive Officer and the President,
the Chairman shall have authority to execute bonds, mortgages and other
contracts (whether or not requiring a seal), except where required or permitted
by law to be otherwise signed and executed and except where the signing and
execution thereof are expressly delegated by the Board to some other officer or
agent of the Corporation.

         Section 4.7 The Chief Executive Officer. The Chief Executive Officer
("CEO"), if one is elected, shall be the chief executive officer of the
Corporation; shall have general and active management of the business of the
Corporation; shall, in the absence of the Chairman, preside at meetings of the
Board and stockholders; and shall see that all orders and resolutions of the
Board are carried into effect. In addition to the Chairman and the President,
the CEO shall have authority to execute bonds, mortgages and other contracts
requiring a seal, under the seal of the Corporation, except where required or
permitted by law to be otherwise signed and executed and except where the
signing and execution thereof are expressly delegated by the Board to some other
officer or agent of the Corporation.

         Section 4.8 The President. The President, subject to the direction of
the CEO, if one is elected, shall have general and active management of the
business of the Corporation; shall, in the absence of the Chairman and the CEO,
preside at meetings of the Board and stockholders; and shall see that all orders
and resolutions of the Board and the CEO are carried into effect. In addition to
the Chairman and the CEO, the President shall have authority to execute bonds,
mortgages and other contracts requiring a seal, under the seal of the
Corporation, except where required or permitted by law to be otherwise signed
and executed and except where the signing and execution thereof is expressly
delegated by the Board to some other officer or agent of the Corporation.

         Section 4.9 Chief Operating Officer. The Chief Operating Officer
("COO"), subject to the direction of the President, shall have general
management responsibility for the day-to-day business and operations of the
Corporation, and shall perform such other duties and exercise such other powers
as the Board, the CEO or the President may, from time to time, determine or
these Bylaws may prescribe.

         Section 4.10 Vice President. The Vice President, or if there shall be
more than one, the vice presidents shall perform such other duties and have such
other powers as the Board, the CEO or the President may, from time to time,
determine or these bylaws may prescribe.

         Section 4.11 Secretary and Assistant Secretaries. The Secretary shall
attend all meetings of the Board and all meetings of the stockholders; shall
record all the proceedings of the meetings of the stockholders and of the Board
in a book to be kept for that purpose; and shall perform like duties for the
Board's standing committees when required. The Secretary shall give, or cause to
be given, notice of all meetings of the stockholders and special meetings of the
Board; shall perform such other duties as may be prescribed by the Board, the
CEO or the President, under whose supervision he or she shall act; shall have
custody of the corporate seal of


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<PAGE>   153

the Corporation; and shall have authority to affix the same to any instrument
requiring it and, when it is so affixed, may attest it by his or her signature.
The Board may give general authority to any other officer to affix the seal of
the Corporation and to attest the affixing by his or her signature. The
Assistant Secretary, or if there be more than one, the assistant secretaries in
the order determined by the Board, shall, in the absence or disability of the
Secretary, perform the duties and exercise the powers of the Secretary and shall
perform such other duties and have such other powers as the Board may from time
to time prescribe.

         Section 4.12 Treasurer and Assistant Treasurer. The Treasurer shall
have the custody of the corporate funds and securities; shall keep full and
accurate accounts of receipts and disbursements in books belonging to the
Corporation; shall deposit all monies and other valuable effects in the name and
to the credit of the Corporation as may be ordered by the Board taking proper
vouchers for such disbursements; and shall render to the CEO, the President and
the Board, at its regular meetings or when the Board so requires, an account of
the Corporation. If required by the Board, the Treasurer shall give the
Corporation a bond (which shall be renewed every six (6) years) in such sums and
with such surety or sureties as shall be satisfactory to the Board for the
faithful performance of the duties of the office of Treasurer and for the
restoration to the Corporation, in case of death, resignation, retirement or
removal from office, of all books, papers, vouchers, money and other property of
whatever kind in the possession or under the control of the Treasurer belonging
to the Corporation. The Assistant Treasurer, or if there shall be more than one,
the assistant treasurers in the order determined by the Board, shall, in the
absence or disability of the Treasurer, perform the duties and exercise the
powers of the Treasurer and shall perform such other duties and have such other
powers as the Board may from time to time prescribe.

         Section 4.13 Compensation. The compensation of the officers of the
Corporation shall be fixed from time to time by the Board. None of such officers
shall be prevented from receiving such compensation by reason of the fact that
he or she is also a director of the Corporation. Nothing contained herein shall
preclude any officer from serving the Corporation, or any subsidiary
corporation, in any other capacity and receiving such compensation by reason of
the fact that he or she is also a director of the Corporation.

                                    ARTICLE 5
                                 INDEMNIFICATION


         Section 5.1 Action, Etc. Other Than by or in the Right of the
Corporation. The Corporation shall indemnify any person who was or is a party or
is threatened to be made a party to any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative
(other than an action by or in the right of the Corporation) by reason of the
fact that he is or was a director, officer, employee or agent of the
Corporation, or is or was serving at the request of the Corporation as a
director, officer, employee or agent of another corporation, partnership, joint
venture, trust or other enterprise, against expenses (including attorneys'
fees), judgments, fines and amounts paid in settlement actually and reasonably
incurred by him in connection with such action, suit or proceeding if he acted
in good faith and in a manner he reasonably believed to be in or not opposed to
the best interests of the

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<PAGE>   154
Corporation, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe his conduct was unlawful. The termination of any
action, suit or proceeding by judgment, order, settlement or conviction, or upon
a plea of nolo contenders or its equivalent, shall not of itself create a
presumption that the person did not act in good faith and in a manner he
reasonably believed to be in or not opposed to the best interests of the
Corporation, or, with respect to any criminal action or proceeding, that he
had reasonable cause to believe that his or her conduct was unlawful.

         Section 5.2 Actions, Etc., by or in the Right of the Corporation. The
Corporation shall indemnify any person who was or is a party or is threatened to
be made a party to any threatened, pending or completed action or suit by or in
the right of the Corporation to procure a judgment in its favor by reason of the
fact that he is or was a director, officer, employee or agent of the
Corporation, or is or was serving at the request of the Corporation as a
director, officer, employee or agent of another corporation, partnership, joint
venture, trust or other enterprise, against expenses (including attorneys, fees)
actually and reasonably incurred by him in connection with the defense or
settlement of such action or suit if he acted in good faith and in a manner he
reasonably believed to be in or not opposed to the best interests of the
Corporation; provided, however, except that no indemnification shall be made in
respect of any claim, issue or matter as to which such person shall have been
adjudged to be liable for negligence or misconduct in the performance of his
duty to the Corporation unless and only to the extent that the Court of Chancery
of the State of Delaware or the court in which such action or suit was brought
shall determine upon application that, despite the adjudication of liability but
in view of all the circumstances of the case, such person is fairly and
reasonably entitled to indemnity for such expenses as the Court of Chancery of
the State of Delaware or such other court shall deem proper.

         Section 5.3 Determination of Right of Indemnification. Any
indemnification under Section 5.1 or 5.2 (unless ordered by a court) shall be
made by the Corporation only as authorized in the specific case upon a
determination that indemnification of the director, officer, employee or agent
is proper in the circumstances because he has met the applicable standard of
conduct set forth in Section 5.1 or 5.2. Such determination shall be made (i) by
the Board by a majority vote of a quorum consisting of directors who were not
parties to such action, suit or proceeding, or (ii) if such a quorum is not
obtainable, or, even if obtainable a quorum of disinterested directors so
directs, by independent legal counsel in a written opinion or (iii) by the
stockholders.

         Section 5.4 Indemnification Against Expenses of Successful Party.
Notwithstanding the other provisions of this Article, to the extent that a
director, officer, employee or agent of the Corporation has been successful on
the merits or otherwise in defense of any action, suit or proceeding referred to
in Section 5.1 or 5.2, or in defense of any claim, issue or matter therein, he
shall be indemnified against expenses (including attorneys' fees) actually and
reasonably incurred by him in connection therewith.

         Section 5.5 Right to Advancement of Expenses. Expenses (including
attorneys' fees) incurred by a director in defending any civil, criminal,
administrative or investigative action, suit or proceeding by reason of the fact
that he or she is or was a director, shall be paid by the


                                       12
<PAGE>   155

Corporation in advance of the final disposition of such action, suit or
proceeding; provided, however, that any such advancement of expenses shall be
made only upon delivery to the Corporation of an undertaking by or on behalf of
such director to repay such amount if it shall ultimately be determined that he
or she is not entitled to be indemnified for such expenses. Expenses (including
attorneys' fees) incurred by an officer in defending a civil, criminal,
administrative, or investigative action, suit or proceeding by reason of the
fact that he or she is or was an officer, employee or agent of the Corporation
may be paid by the Corporation in advance of the final disposition of such
action, suit or proceeding if and as authorized by the Board in the specific
case upon receipt of an undertaking by or on behalf of the officer to repay such
amount if it shall ultimately be determined that he or she is not entitled to be
indemnified by the Corporation as authorized in this Article. Such expenses
(including attorneys' fees) incurred by other employees and agents may be so
paid or advanced by the Corporation if and as authorized by the Board in the
specific case and upon such terms and conditions as the Board deems appropriate.

         Section 5.6 Other Rights and Remedies. The indemnification and
advancement of expenses provided by, or granted pursuant to, this Article shall
not be deemed exclusive of any other rights to which those seeking
indemnification or advancement of expenses may be entitled under any Bylaws,
agreement, vote of stockholders or disinterested directors or otherwise, both as
to action in his official capacity and as to action in another capacity while
holding such office, and shall continue as to a person who has ceased to be a
director, officer, employee or agent and shall inure to the benefit of the
heirs, executors and administrators of such a person.

         Section 5.7 Insurance. Upon resolution passed by the Board, the
Corporation may purchase and maintain insurance on behalf of any person who is
or was a director, officer, employee or agent of the Corporation, or is or was
serving at the request of the Corporation as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust or other
enterprise, against any liability asserted against him and incurred by him in
any such capacity, or arising out of his status as such, whether or not the
Corporation would have the power to indemnify him against such liability under
the provisions of this Article.

         Section 5.8 Constituent Corporations. For the purposes of this Article,
references to "the Corporation" include all constituent corporations absorbed in
a consolidation or merger as well as the resulting or surviving corporation, so
that any person who is or was a director, officer, employee or agent of such a
constituent corporation or is or was serving at the request of such constituent
corporation as a director, officer, employee or agent of another corporation,
partnership, joint venture, trust or other enterprise shall stand in the same
position under the provisions of this Article with respect to the resulting or
surviving corporation as he would if he had served the resulting or surviving
corporation in the same capacity.

         Section 5.9 Other Enterprises, Fines, and Serving at Corporation's
Request. For the purposes of this Article, references to "other enterprises"
shall include employee benefit plans; references to "fines" shall include any
excise taxes assessed on a person with respect to any employee benefit plan; and
references to "serving at the request of the Corporation" shall include any
service as a director, officer, employee or agent of the Corporation that
imposes duties on, or involves services by, such director, officer, employee, or
agent with respect to an employee


                                       13
<PAGE>   156

benefit plan, its participants or beneficiaries; and a person who acted in good
faith and in a manner he reasonably believed to be in the interest of the
participants and beneficiaries of an employee benefit plan shall be deemed to
have acted in a manner "not opposed to the best interests of the Corporation" as
used in this Article.

         Section 5.10 Right of Indemnitee to Bring Suit or Proceeding. The
rights to indemnification and to the advancement of expenses conferred in this
Article 5 shall be contract rights and such rights shall continue as to an
indemnitee who has ceased to be a director, officer, employee or agent and shall
inure to the benefit of the indemnitee's heirs, executors and administrators.
Any repeal or modification of the provisions of this Article 5 shall be
prospective only and shall not adversely affect any right or protection
hereunder of any person with respect to any action, suit or proceeding arising
out of or relating to any act or omission occurring prior to the time of such
repeal or modification. If a claim under this Article 5 is not paid in full by
the Corporation within sixty (60) days after a written claim has been received
by the Corporation, except in the case of a claim for an advancement of expenses
by a director, in which case the applicable period shall be twenty (20) days,
the indemnitee may at any time thereafter bring a suit or other proceeding
against the Corporation to recover the unpaid amount of the claim. If successful
in whole or in part in any such suit or proceeding, or in a suit or proceeding
brought by the Corporation to recover an advancement of expenses pursuant to the
terms of an undertaking, the indemnitee shall be entitled to be paid also the
expenses (including attorneys' fees) of prosecuting or defending such suit or
proceeding. Neither the failure of the Corporation (including its Board of
Directors, independent legal counsel or its stockholders) to have made a
determination prior to the commencement of such suit or proceeding that
indemnification of the indemnitee is proper under the circumstances because the
indemnitee has met the applicable standard of conduct set forth in the General
Corporation Law of the State of Delaware, nor an actual determination by the
Corporation (including its Board of Directors, independent legal counsel, or its
stockholders) that the indemnitee has not met such applicable standard of
conduct, shall create a presumption that the indemnitee has not met the
applicable standard of conduct or, in the case of such a suit or proceeding
brought by the indemnitee, be a defense to such suit or proceeding. In any such
suit or proceeding brought by the indemnitee to enforce a right to
indemnification or to an advancement of expenses hereunder, or brought by the
Corporation to recover the advancement of expenses pursuant to the terms of an
undertaking, the burden of proving that the indemnitee is not entitled to be
indemnified, or to such advancement of expenses, under this Article 5 or
otherwise, shall be on the Corporation.

                                    ARTICLE 6
                 CONTRACTS, CHECKS, DRAFTS, BANK ACCOUNTS, ETC.


         Section 6.1 Execution of Contracts. The Board, except as otherwise
provided in these Bylaws, may authorize any officer or officers, agent or
agents, to enter into any contract or execute any instrument in the name and on
behalf of the Corporation, and such authority may be general or confined to
specific instances. It may appoint, or authorize any officer or officers to
appoint, one or more transfer clerks or one or more transfer agents and one or
more registrars, and may require all certificates for stock to bear the
signature or signatures of any of them.


                                       14
<PAGE>   157

         Section 6.2 Checks, Drafts, Etc. All checks, drafts or other orders for
payment of money, notes or other evidence of indebtedness, issued in the name of
or payable to the Corporation, shall be signed or endorsed by such person or
persons and in such manner as, from time to time, shall be determined by
resolution of the Board. Each such officer, assistant, agent or attorney shall
give such bond, if any, as the Board may require.

         Section 6.3 Deposits. All funds of the Corporation not otherwise
employed shall be deposited from time to time to the credit of the Corporation
in such banks, trust companies or other depositories as the Board may select, or
as may be selected by any officer or officers, assistant or assistants, agent or
agents, or attorney or attorneys of the Corporation to whom such power is
delegated by the Board. For the purpose of deposit and for the purpose of
collection for the account of the Corporation, the CEO, the President, any Vice
President or the Treasurer (or any other officer or officers, assistant or
assistants, agent or agents, or attorney or attorneys of the Corporation who
shall from time to time be determined by the Board) may endorse, assign and
deliver checks, drafts and other orders for the payment of money that are
payable to the order of the Corporation.

         Section 6.4 General and Special Bank Accounts. The Board may from time
to time authorize the opening and keeping of general and special bank accounts
with such banks, trust companies or other depositories as the Board may select
or as may be selected by any officer or officers, assistant or assistants, agent
or agents, or attorney or attorneys of the Corporation to whom such power is
delegated by the Board. The Board may make such special rules and regulations
with respect to such bank accounts, not inconsistent with the provisions of
these Bylaws, as it may deem expedient.

                                    ARTICLE 7
                                      STOCK


         Section 7.1 Certificates for Stock. Every owner of stock of the
Corporation shall be entitled to have a certificate or certificates, to be in
such form as the Board shall prescribe, certifying the number and class of
shares of the stock of the Corporation owned by him. The certificates
representing shares of such stock shall be numbered in the order in which they
are issued and shall be signed in the name of the Corporation by the CEO, the
President or a Vice President, and by the Secretary or an Assistant Secretary or
by the Treasurer or an Assistant Treasurer. Any or all of the signatures on the
certificates may be a facsimile. If any officer, transfer agent or registrar who
has signed, or whose facsimile signature has been placed upon, any such
certificate, has ceased to be such officer, transfer agent or registrar before
such certificate is issued, such certificate may nevertheless be issued by the
Corporation with the same effect as though the person who signed such
certificate, or whose facsimile signature was placed thereupon, were such
officer, transfer agent or registrar at the date of issue. A record shall be
kept of the respective names of the persons, firms or corporations owning the
stock represented by such certificates, the number and class of shares
represented by such certificates, respectively, and the respective dates
thereof, and in case of cancellation, the respective dates of cancellation.
Every certificate surrendered to the Corporation for exchange or transfer shall
be cancelled, and


                                       15
<PAGE>   158

no new certificate or certificates shall be issued in exchange for any existing
certificate until such existing certificate shall have been so cancelled, except
as provided in Section 7.4.

         Section 7.2 Transfers of Stock. Transfers of shares of stock of the
Corporation shall be made only on the books of the Corporation by the registered
holder thereof, or by his attorney thereunto authorized by power of attorney
duly executed and filed with the Secretary, or with a transfer clerk or a
transfer agent appointed as provided in Section 7.3, and upon surrender of the
certificate or certificates for such shares properly endorsed and the payment of
all taxes thereon. The person in whose name shares of stock stand on the books
of the Corporation shall be deemed by the Corporation to be the owner thereof
for all purposes. Whenever any transfer of shares is made for collateral
security, and not absolutely, such fact shall be so expressed in the entry of
transfer if, when the certificate or certificates are presented to the
Corporation for transfer, both the transferor and the transferee request the
Corporation to do so.

         Section 7.3 Regulations. The Board may make such rules and regulations
as it may deem expedient (if not inconsistent with these Bylaws) concerning the
issue, transfer and registration of certificates for shares of the stock of the
Corporation. It may appoint, or authorize any officer or officers to appoint,
one or more transfer clerks or one or more transfer agents and one or more
registrars, and may require all certificates for stock to bear the signature or
signatures of any of them.

         Section 7.4 Lost, Stolen, Destroyed and Mutilated Certificates. In any
case of loss, theft, destruction or mutilation of any certificate of stock,
another may be issued in its place upon proof of such loss, theft, destruction
or mutilation and upon the giving of a bond of indemnity to the Corporation in
such form and in such sum as the Board may direct; provided, however, that a new
certificate may be issued without requiring any bond when, in the judgment of
the Board, it is proper to do so.

         Section 7.5 Fixing Date for Determination of Stockholders of Record. In
order that the Corporation may determine the stockholders entitled to notice of
or to vote at any meeting of stockholders (or any adjournment thereof) or to
express consent to corporate action in writing without a meeting, or entitled to
receive payment of any dividend or other distribution or allotment of any
rights, or entitled to exercise any rights in respect of any other change,
conversion or exchange of stock or for the purpose of any other lawful action,
the Board may fix, in advance, a record date, which shall not be more than sixty
(60) nor less than ten (10) days before the date of such meeting, nor more than
sixty (60) days prior to any other action. If, in any case involving the
determination of stockholders for any purpose other than notice of or voting at
a meeting of stockholders or expressing consent to corporate action without a
meeting, the Board shall not fix such a record date, then the record date for
determining stockholders for such purpose shall be the close of business on the
day on which the Board adopts the resolution relating thereto. A determination
of stockholders entitled to notice of or to vote at a meeting of stockholders
shall apply to any adjournment of such meeting; provided, however, that the
Board may fix a new record date for the adjourned meeting.


                                       16
<PAGE>   159

                                    ARTICLE 8
                                  MISCELLANEOUS


         Section 8.1 Fiscal Year. The fiscal year of the Corporation shall be
determined by resolution of the Board.

         Section 8.2 Seal. The Board shall provide a corporate seal, which shall
be in the form of a circle and shall bear the name of the Corporation and words
and figures showing that the Corporation was incorporated in the State of
Delaware and the year of incorporation.

         Section 8.3 Waiver of Notices. Whenever notice is required to be given
by these Bylaws, by the Certificate of Incorporation or by law, the person
entitled to said notice may waive such notice in writing, either before or after
the time stated therein, and such waiver shall be deemed equivalent to notice.

         Section 8.4 Amendments. Except as expressly provided herein, these
Bylaws, or any of them, may be amended, modified, repealed or adopted and new
Bylaws may be made (i) by the Board, acting at any meeting of the Board, acting
by Special Majority, or (ii) by the holders of the Common Stock and Series A
Stock, each voting as a separate class, at any annual meeting of stockholders,
without previous notice, or at any special meeting of stockholders, provided
that notice of such proposed amendment, modification, repeal or adoption is
given in the notice of special meeting. Except as expressly provided herein, any
Bylaws made or altered by the stockholders may be altered or repealed by either
the Board or the stockholders.


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<PAGE>   160

                                                                       EXHIBIT D





                             [INTENTIONALLY OMITTED]


<PAGE>   161

                                                                       EXHIBIT E

                              AMENDED AND RESTATED
                               OPERATING AGREEMENT
                                       OF
                          THIRD PARTY INVESTORS I, LLC



         THIS OPERATING AGREEMENT (this "Agreement") of Third Party Investors I,
LLC, a Delaware limited liability company (the "Company"), is adopted as of
_______, 2000 (the "Effective Date"), by Alterra Healthcare Corporation, a
Delaware corporation ("Sole Member"), as the sole member of the Company.

         The Company was formed as a limited liability company under the
Delaware Limited Liability Company Act (the "Act"), pursuant to a Certificate of
Formation that was filed on December 29, 1998 with the Secretary of State of
Delaware.

         Sole Member is the sole member of the Company. As provided in the Act,
the entire management of the Company is vested in Sole Member as the sole
member. This Agreement is the limited liability company agreement of the Company
and supersedes in its entirety that certain Amended and Restated Operating
Agreement dated June 30, 1999, which governed the Company prior to the Effective
Date. As of the Effective Date, the Company shall be governed by the Act and
this Agreement.

         Sole Member intends that the Company be disregarded as a separate
entity for Federal income tax purposes pursuant to Treasury Regulations ss.
301.7701-3. Accordingly, no election to the contrary shall be filed by or on
behalf of the Company and all income, gain, loss, deduction and credit of the
Company shall be reported by Sole Member on its returns.

         IN WITNESS WHEREOF, Sole Member has duly executed this Amended and
Restated Operating Agreement as of the Effective Date.


                                  SOLE MEMBER:

                                  ALTERRA HEALTHCARE CORPORATION,
                                  a Delaware corporation



                                  By:
                                     ----------------------------
                                  Name:
                                  Title:



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