MICHAELS STORES INC
SC 13D/A, 1997-05-01
HOBBY, TOY & GAME SHOPS
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

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

                                Schedule 13D/A

                   Under the Securities Exchange Act of 1934
                              (Amendment No. 27)


                             Michaels Stores, Inc.
                               (Name of Issuer)


                    Common Stock, par value $0.10 per share
                        (Title of Class of Securities)


                                  594087-10-8
                                (CUSIP Number)


                                Robert L. Estep
                          Jones, Day, Reavis & Pogue
                           2300 Trammell Crow Center
                               2001 Ross Avenue
                             Dallas, Texas  75201
                                (214) 220-3939
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)


                                April 30, 1997
                     (Date of Event which Requires Filing
                              of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [_].


                        (Continued on following pages)

                             (Page 1 of 19 Pages)
<PAGE>
 
CUSIP NO.594087                     13D/A                    Page 2 of 19 Pages 

================================================================================
 1   NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
     Sam Wyly  ###-##-####
- --------------------------------------------------------------------------------
 2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                        (b) [_]
- --------------------------------------------------------------------------------
 3   SEC USE ONLY
- --------------------------------------------------------------------------------
 4   SOURCE OF FUNDS*
 
     BK, OO, WC
- --------------------------------------------------------------------------------
 5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                      [_]
- --------------------------------------------------------------------------------
 6   CITIZENSHIP OR PLACE OF ORGANIZATION
 
     United States
- --------------------------------------------------------------------------------
  NUMBER OF          7   SOLE VOTING POWER
   SHARES           
 BENEFICIALLY            1,616,069
   OWNED BY         ------------------------------------------------------------
     EACH            8   SHARED VOTING POWER         
  REPORTING          
 PERSON WITH             315,836          
                    ------------------------------------------------------------
                     9   SOLE DISPOSITIVE POWER
  
                         2,249,402
                    ------------------------------------------------------------
                     10  SHARED DISPOSITIVE POWER
 
                         315,836
- --------------------------------------------------------------------------------
 11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
     2,565,238
- --------------------------------------------------------------------------------
 12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
- --------------------------------------------------------------------------------
 13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
     9.7%
- --------------------------------------------------------------------------------
 14  TYPE OF REPORTING PERSON*
 
     IN
================================================================================
<PAGE>
 
CUSIP NO.594087-10-8                13D/A                    Page 3 of 19 Pages 

================================================================================
 1   NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
     Charles J. Wyly, Jr.  ###-##-####
- --------------------------------------------------------------------------------
 2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                        (b) [_]
- --------------------------------------------------------------------------------
 3   SEC USE ONLY
- --------------------------------------------------------------------------------
 4   SOURCE OF FUNDS*
 
     BK, OO, WC
- --------------------------------------------------------------------------------
 5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                      [_]
- --------------------------------------------------------------------------------
 6   CITIZENSHIP OR PLACE OF ORGANIZATION
 
     United States
- --------------------------------------------------------------------------------
  NUMBER OF          7   SOLE VOTING POWER
   SHARES           
 BENEFICIALLY            1,597,233
   OWNED BY         ------------------------------------------------------------
     EACH            8   SHARED VOTING POWER 
  REPORTING          
 PERSON WITH             300,374 
                    ------------------------------------------------------------
                     9   SOLE DISPOSITIVE POWER
 
                         1,864,650
                    ------------------------------------------------------------
                     10  SHARED DISPOSITIVE POWER
 
                         300,374
- --------------------------------------------------------------------------------
 11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
     2,165,024
- --------------------------------------------------------------------------------
 12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
- --------------------------------------------------------------------------------
 13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
     8.3%
- --------------------------------------------------------------------------------
 14  TYPE OF REPORTING PERSON*
 
     IN
================================================================================
<PAGE>
 
CUSIP NO.594087-10-8                13D/A                    Page 4 of 19 Pages 

================================================================================
 1   NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
     Maverick Entrepreneurs Fund, Ltd.
     75-2319145
- --------------------------------------------------------------------------------
 2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                        (b) [_]
- --------------------------------------------------------------------------------
 3   SEC USE ONLY
- --------------------------------------------------------------------------------
 4   SOURCE OF FUNDS*
 
     BK, OO, WC
- --------------------------------------------------------------------------------
 5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                      [_]
- --------------------------------------------------------------------------------
 6   CITIZENSHIP OR PLACE OF ORGANIZATION
 
     Texas
- --------------------------------------------------------------------------------
  NUMBER OF          7   SOLE VOTING POWER
   SHARES
 BENEFICIALLY            300,000
   OWNED BY         ------------------------------------------------------------
     EACH            8   SHARED VOTING POWER
  REPORTING            
 PERSON WITH             0
                    ------------------------------------------------------------
                     9   SOLE DISPOSITIVE POWER
 
                         300,000
                    ------------------------------------------------------------
                     10  SHARED DISPOSITIVE POWER
 
                         0
- --------------------------------------------------------------------------------
 11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
     300,000
- --------------------------------------------------------------------------------
 12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_]
- --------------------------------------------------------------------------------
 13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
     1.3%
- --------------------------------------------------------------------------------
 14  TYPE OF REPORTING PERSON*
 
     PN
================================================================================
<PAGE>
 
CUSIP NO.594087-10-8                13D/A                   Page 5 of 19 Pages  

         This Schedule 13D/A Amendment No. 27 hereby amends and restates in its
entirety the Schedule 13D, filed jointly by Sam Wyly, Charles J. Wyly, Jr. and
Maverick Entrepreneurs Fund, Ltd. ("Maverick Entrepreneurs" and collectively
with Sam Wyly and Charles J. Wyly, Jr., the "Reporting Persons") with respect to
the securities of Michaels Stores, Inc. (the "Company").

Item 1.  Security and Issuer.
         ------------------- 

         This statement relates to the ownership of common stock, par value $.10
per share ("Common Stock"), of Michaels Stores, Inc., a Delaware corporation.
The Company's principal executive offices are located at 8000 Bent Branch Drive,
Irving, Texas 75063.

Item 2.  Identity and Background.
         ----------------------- 

         This Statement is being filed by Mr. Sam Wyly, Mr. Charles J. Wyly, Jr.
and Maverick Entrepreneurs. Maverick Entrepreneurs is a Texas limited
partnership of which Mr. Sam Wyly and Mr. Charles J. Wyly, Jr. are the sole
general partners.

         The principal business and office address for each of the Reporting
Persons is 300 Crescent Court, Suite 1000, Dallas, Texas 75201. Sam Wyly is
principally employed as Chairman of the Board of Directors of each of Sterling
Software, Inc. and the Company. Charles Wyly is principally employed as Vice
Chairman of the Board of Directors of each of Sterling Software, Inc. and the
Company.

         No Reporting Person has, during the last five years, been convicted in
a criminal proceeding (excluding traffic violations or similar misdemeanors) or
been a party to a civil proceeding of a judicial or administrative body
resulting in subjection to a judgment, decree or final order enjoining future
violations of, or prohibiting or mandating activities subject to, federal or
state securities laws or finding any violation with respect to such laws.

         Sam Wyly and Charles J. Wyly, Jr. is each a citizen of the United
States. Maverick Enterpreneurs is a Texas limited partnership.

Item 3.  Source and Amount of Funds or Other Consideration.
         ------------------------------------------------- 

         The source of funds to hold a portion of the shares of Common Stock is
borrowings under revolving lines of credit maintained with NationsBank of Texas,
N.A. ("NationsBank") by each of (i) the trusts described in Item 5 for which Sam
Wyly is trustee (the "Sam Wyly Trusts") and Tallulah, Ltd., (ii) the trusts
described in Item 5 for which Charles J. Wyly, Jr. is trustee (the "Charles Wyly
Trusts") and Brush Creek, Ltd., and (iii) Maverick Entrepreneurs.   See Item 6
below.

         The source of funds to hold a portion of the shares of Common Stock
beneficially owned by the Reporting Persons is borrowings under loan agreements
between Lehman Brothers Finance S.A. ("Lehman") and each of (i) the Charles Wyly
Trusts and Brush Creek, Ltd., and (ii) the Sam Wyly Trusts, Tallulah Ltd. and
Maverick Entrepreneurs.  See Item 6 below.

         The options described in Item 5 as held by Sam Wyly and Charles J.
Wyly, Jr. were granted under stock option plans of the Company.

Item 4.  Purpose of Transaction.
         ---------------------- 

         The shares of Common Stock acquired by the Reporting Persons were
acquired for investment. Depending upon market conditions and other factors that
they deem material to an investment decision, any Reporting Person may purchase
additional shares of Common Stock from time to time or may dispose of all or a
portion of the shares of Common Stock they now beneficially own or may hereafter
acquire. Except as set forth in this Item 4, none of the Reporting Persons has
any present plans or proposals that relate to or would result in any of the
actions specified in clauses (a) through (j) of Item 4 of Schedule 13D.

Item 5.  Interest in Securities of the Issuer.
         ------------------------------------ 

         (a)-(c) Mr. Sam Wyly beneficially owns 2,565,238 shares, or
approximately 9.7% of the outstanding Common Stock. Sam Wyly beneficially owns
(i) 633,333 of such shares by virtue of this ownership of options to purchase
Common Stock, (ii) 1,074,536 of such shares as the sole general partner of
Tallulah, Ltd., (iii) 300,000 of such shares as a general partner of Maverick
Entrepreneurs, (iv) 15,836 of such shares by virtue of his holding a power of
attorney to vote the shares of two adult children, and (v) an aggregate of
541,533 of such shares as the sole trustee of the Sam Wyly Trusts listed below:

<TABLE>
<CAPTION>
 
                                                    Number of Shares        
                      Name of Trust                Beneficially Owned       
                      -------------                ------------------       
                                                                            
        <S>                                        <C> 
        1.  The Christiana Parker Wyly Trust              82,393            
        2.  The Andrew David Sparrow Wyly Trust           82,393            
        3.  The Laurie L. Wyly Revocable Trust           123,943            
        4.  The Lisa Wyly Revocable Trust                123,943            
        5.  The Kelly Wyly Elliot Trust                  128,861            
</TABLE>
<PAGE>
 
CUSIP NO.594087-10-8                13D/A                    Page 6 of 19 Pages 

Sam Wyly possesses sole voting power with respect to 1,616,069 shares of Common
Stock, sole dispositive power with respect to 2,249,402 shares of Common Stock
and shared voting and dispositive power with respect to 315,836 shares of Common
Stock held by Maverick Entrepreneurs.

         Charles J. Wyly, Jr. beneficially owns 2,165,024 shares, or
approximately 8.3% of the outstanding Common Stock. Charles J. Wyly, Jr.
beneficially owns (i) 267,417 of such shares by virtue of his ownership of
options to purchase Common Stock, (ii) 755,000 of such shares as the sole
general partner of Brush Creek, Ltd., (iii) 300,000 of such shares as a general
partner of Maverick Entrepreneurs, (iv) 374 of such shares by virtue of his
holding a power of attorney to vote the shares of two adult children, and (v) an
aggregate of 842,233 of such shares as trustee of the Charles Wyly Trusts listed
below:

<TABLE>
<CAPTION>
 
                                                  Number of Shares    
                      Name of Trust              Beneficially Owned   
           ------------------------------------  ------------------   
           <S>                                   <C>                  
                                                                      
           1.  The Martha Caroline Wyly Trust          170,000        
           2.  The Charles J. Wyly, III Trust          224,247        
           3.  The Emily Ann Wyly Trust                224,146        
           4.  The Jennifer Lynn Wyly Trust            223,840         
</TABLE>

Charles J. Wyly, Jr. possesses sole voting power with respect to 1,597,233
shares of Common Stock, sole dispositive power with respect to 1,864,650 shares
of Common Stock and shared voting and dispositive power with respect to 300,374
shares of Common Stock held by Maverick Entrepreneurs.

         Maverick Entrepreneurs beneficially owns and possesses sole voting and
dispositive power with respect to 300,000 shares, or approximately 1.3% of the
outstanding Common Stock.

         The Reporting Persons as a group beneficially own an aggregate of
4,430,262 shares of Common Stock, or approximately 16.6% of the outstanding
Common Stock. The Reporting Persons as a group have sole voting power with
respect to 3,513,302 shares of Common Stock and sole dispositive power with
respect to 4,414,052 shares of Common Stock.

         No transactions in the Common Stock were effected by the Reporting
Persons during the last 60 days or since the most recent filing on Schedule 13D,
whichever is less.

         (d)  No other person is known to have the right to receive or the power
to direct the receipt of dividends from, or the proceeds from the sale of, the
Common Stock deemed to be beneficially owned by the Reporting Persons.

         (e)  Not applicable.

Item 6.  Contracts, Arrangements, Understandings or Relationships with respect
         ---------------------------------------------------------------------
         to Securities of the Issuer.
         --------------------------- 

         On February 23, 1995, each of (i) the Charles Wyly Trusts and Brush
Creek, Ltd., and (ii) the Sam Wyly Trusts, Tallulah, Ltd. and Maverick
Entrepreneurs (collectively, the "Borrowers") entered into a loan agreement with
Lehman providing for loans to the Borrowers from time to time (the "Loan
Agreements"). In connection with the Loan Agreements, the Borrowers entered into
various security documents provided for in the Loan Agreements (the "Security
Documents"). Included in the Security Documents are documents that provide, in
general, that: (i) with respect to an aggregate of 1,771,163 shares of Common
Stock (770,000 shares of which are beneficially owned by Mr. Sam Wyly, 801,163
shares of which are beneficially owned by Mr. Charles J. Wyly, Jr., and 200,000
shares of which are beneficially owned by each of the Reporting Persons), if the
market price of such shares on or before February 23, 1998, is less than
$28.5574, then Lehman, upon the request of the Borrowers, will pay to the
Borrowers the difference between the market price and such specified amount at
the time of such request, and if the market price on February 23, 1998, is
greater than $48.2302, the Borrowers will, on that date, pay to Lehman the
difference between such market price and such specified amount; and (ii) the
Borrowers are required to pledge such rights and an aggregate of 1,771,163
shares to secure their obligations under the Security Documents.

         Each of (i) the Sam Wyly Trusts and Tallulah, Ltd., (ii) the Charles
Wyly Trusts and Brush Creek, Ltd., and (iii) Maverick Entrepreneurs maintains
separate revolving lines of credit with NationsBank (collectively, the
"NationsBank Credit Facilities"). The obligations of each borrower to repay
advances made under its NationsBank Credit Facilities are several, full-recourse
obligations that are secured by the pledge of shares of Common Stock
beneficially owned by the Reporting Persons as well as other securities. Each
advance under a NationsBank Credit Facility bears interest at NationsBank's
prime rate or at a floating rate, as elected by the borrower. Sam Wyly and
Charles J. Wyly, Jr. have each guaranteed the obligations of Maverick
Entrepreneurs under its NationsBank Credit Facility. The NationsBank Credit
Facilities will mature on November 22, 1998.

         The foregoing descriptions of the agreements relating to the Loan
Agreements, the Security Documents and the NationsBank Credit Facilities are
qualified in their entirety by reference to such agreements, copies of which
have been filed as exhibits to this Schedule 13D and are incorporated herein by
reference.
<PAGE>
 
CUSPID NO. 594087-10-8                  13D/A                 Page 7 of 19 Pages

<TABLE>
<CAPTION>


Item 7. Material to be Filed as Exhibits.
        --------------------------------
        <S>               <C> 
        Exhibit 1.*       Agreement pursuant to Rule 13d-1(f)(1)(iii).
                           
        Exhibit 2.1       Form of Loan Agreement dated as of February 23, 1995
                          between Lehman Brothers Finance S.A., and the Charles
                          Wyly Trusts and Brush Creek, Ltd. (Previously filed
                          as Exhibit 2.1 to Amendment No. 23 to this Schedule
                          13D.)
                           
        Exhibit 2.2       Form of Loan Agreement, dated as of February 23,
                          1995, between Lehman Brothers Finance S.A., and the
                          Sam Wyly Trusts, Tallulah Ltd. and Maverick
                          Entrepreneurs. (Previously filed as Exhibit 2.2 to
                          Amendment No. 23 to this Schedule 13D.)
                           
        Exhibit 3.1       Form of Option Transaction Confirmation, dated as of
                          February 23, 1995, by Lehman Brothers Finance S.A. to
                          the Counterparties set forth on Exhibit A thereto.
                          (Previously filed as Exhibit 3.1 to Amendment No. 23
                          to this Schedule 13D.)
                           
        Exhibit 3.2       Form of Option Transaction Confirmation, dated as of
                          February 23, 1995, by Lehman Brothers Finance S.A. to
                          the Counterparties set forth on Exhibit A thereto.
                          (Previously filed as Exhibit 3.2 to Amendment No. 23
                          to this Schedule 13D.)
                           
        Exhibit 3.3       Form of Option Transaction Confirmation, dated as of
                          February 23, 1995, by Lehman Brothers Finance S.A. to
                          the Counterparties set forth on Exhibit A thereto.
                          (Previously filed as Exhibit 3.3 to Amendment No. 23
                          to this Schedule 13D.)
                           
        Exhibit 3.4       Form of Option Transaction Confirmation, dated as of
                          February 23, 1995, by Lehman Brothers Finance S.A. to
                          the Counterparties set forth on Exhibit A thereto.
                          (Previously filed as Exhibit 3.4 to Amendment No. 23
                          to this Schedule 13D.)
                           
        Exhibit 4.1       Form of Pledge Agreement, dated as of February 23,
                          1995, between Lehman Brothers Finance S.A. and the
                          Counterparties set forth on Exhibit A thereto.
                          (Previously filed as Exhibit 4.1 to Amendment No. 23
                          to this Schedule 13D.)
                           
        Exhibit 4.2       Form of Pledge Agreement, dated as of February 23,
                          1995, between Lehman Brothers Finance S.A. and the
                          Counterparties set forth on Exhibit A thereto.
                          (Previously filed as Exhibit 4.2 to Amendment No. 23
                          to this Schedule 13D.)
                          
        Exhibit 5.        Form of Guarantee Agreement. (Previously filed as
                          Exhibit 5.1 to Amendment No. 23 to this Schedule
                          13D.)
                           
        Exhibit 6.*       Form of Amended and Restated Loan Agreement, dated
                          November 22, 1996, among NationsBank and each of (i)
                          the Sam Wyly Trusts and Tallulah, Ltd.; (ii) the
                          Charles Wyly Trusts and Brush Creek Limited; and
                          (iii) Maverick Entrepreneurs Fund, Ltd. (Previously
                          filed as Exhibit 2 to Amendment No. 26 to this
                          Schedule 13D.)
                           
        Exhibit 7.        Form of Pledge Agreement, dated November 22, 1994,
                          between NationsBank and each of (i) Tallulah, Ltd.;
                          (ii) the Sam Wyly Trusts; (iii) Brush Creek, Ltd.;
                          (iv) the Charles Wyly Trusts; and (v) Maverick
                          Entrepreneurs Fund, Ltd. (Previously filed as
                          Exhibit 3 to Amendment No. 26 to this Schedule 13D.)
                          
        Exhibit 8.        Form of Collateral Maintenance Agreement, dated
                          November 22, 1994, between NationsBank and each of
                          (i) Tallulah, Ltd.; (ii) the Sam Wyly Trusts; (iii)
                          Brush Creek, Ltd.; (iv) the Charles Wyly Trusts; and
                          (v) Maverick Entrepreneurs Fund, Ltd. (Previously
                          filed as Exhibit 4 to Amendment No. 26 to this
                          Schedule 13D.)
                           
        Exhibit 9.        Guaranty, executed as of November 22, 1994, by
                          Tallulah, Ltd., the Sam Wyly Trusts, Brush Creek,
                          Ltd., the Charles Wyly Trusts, and Even Wyly, in
                          favor of NationsBank. (Previously filed as Exhibit 5
                          to Amendment No. 26 to this Schedule 13D.)
</TABLE>
- ---------------------------
*  Filed herewith.
<PAGE>
 
CUSIP NO. 594087-10-8                13D/A                    Page 8 of 19 Pages


                                   SIGNATURES

        After reasonable inquiry, and to the best of our knowledge and belief,
we certify that the information set forth in this statement is true, complete
and correct.
<TABLE> 
<CAPTION> 

<S>                                   <C> 
Date:  April 30, 1997                 /s/ SAM WYLY                     
                                      ------------------------------------------
                                      Sam Wyly                         
                                                                       
                                                                       
                                      /s/ CHARLES J. WYLY, JR.         
                                      ------------------------------------------
                                      Charles J. Wyly, Jr.             
                                                                       
                                                                       
                                      MAVERICK ENTREPRENEURS FUND, LTD.
                                                                       
                                                                       
                                      By: /s/ SAM WYLY                 
                                          --------------------------------------
                                          Sam Wyly                     
                                          General Partner              
                                                                       
                                                                       
                                      By: /s/ CHARLES J. WYLY, JR.     
                                          --------------------------------------
                                          Charles J. Wyly, Jr.         
                                          General Partner              

</TABLE> 
<PAGE>
 
CUSIP NO. 594087-10-8                13D/A                    Page 9 of 19 Pages


                                 EXHIBIT INDEX
 
<TABLE> 
<CAPTION> 

Exhibit No.
- -----------
   <S>       <C> 
   1.*       Agreement pursuant to Rule 13d-1(f)(1)(iii).
   
   2.1       Form of Loan Agreement dated as of February 23, 1995 between
             Lehman Brothers Finance S.A., and The Charles Wyly Trusts and
             Brush Creek, Ltd.  (Previously filed as Exhibit 2.1 to Amendment
             No. 23 to this Schedule 13D.)

   2.2       Form of Loan Agreement, dated as of February 23, 1995, between
             Lehman Brothers Finance S.A., and The Sam Wyly Trusts, Tallulah
             Ltd. and Maverick Entrepreneurs.  (Previously filed as Exhibit 2.2
             to Amendment No. 23 to this Schedule 13D.)

   3.1       Form of Option Transaction Confirmation, dated as of February 23,
             1995, by Lehman Brothers Finance S.A. to the Counterparties set
             forth on Exhibit A thereto.  (Previously filed as Exhibit 3.1 to
             Amendment No. 23 to this Schedule 13D.)

   3.2       Form of Option Transaction Confirmation, dated as of February 23,
             1995, by Lehman Brothers Finance S.A. to the Counterparties set
             forth on Exhibit A thereto.  (Previously filed as Exhibit 3.2 to
             Amendment No. 23 to this Schedule 13D.)

   3.3       Form of Option Transaction Confirmation, dated as of February 23,
             1995, by Lehman Brothers Finance S.A. to the Counterparties set
             forth on Exhibit A thereto.  (Previously filed as Exhibit 3.3 to
             Amendment No. 23 to this Schedule 13D.)

   3.4       Form of Option Transaction Confirmation, dated as of February 23,
             1995, by Lehman Brothers Finance S.A. to the Counterparties set
             forth on Exhibit A thereto.  (Previously filed as Exhibit 3.4 to
             Amendment No. 23 to this Schedule 13D.)

   4.1       Form of Pledge Agreement, dated as of February 23, 1995, between
             Lehman Brothers Finance S.A. and the Counterparties set forth on
             Exhibit A thereto.  (Previously filed as Exhibit 4.1 to Amendment
             No. 23 to this Schedule 13D.)

   4.2       Form of Pledge Agreement, dated as of February 23, 1995, between
             Lehman Brothers Finance S.A. and the Counterparties set forth on
             Exhibit A thereto.  (Previously filed as Exhibit 4.2 to Amendment
             No. 23 to this Schedule 13D.)

   5.        Form of Guarantee Agreement.  (Previously filed as Exhibit 5.1 to
             Amendment No. 23 to this Schedule 13D.)

   6.*       Form of Amended and Restated Loan Agreement, dated November 22,
             1996, among NationsBank and each of (i) the Sam Wyly Trusts and
             Tallulah, Ltd.; (ii) the Charles Wyly Trusts and Brush Creek
             Limited; and (iii) Maverick Entrepreneurs Fund, Ltd.  (Previously
             filed as Exhibit 2 to Amendment No. 26 to this Schedule 13D.)

   7.        Form of Pledge Agreement, dated November 22, 1994, between
             NationsBank and each of (i) Tallulah, Ltd.; (ii) the Sam Wyly
             Trusts; (iii) Brush Creek, Ltd.; (iv) the Charles Wyly Trusts; and
             (v) Maverick Entrepreneurs Fund, Ltd.  (Previously filed as
             Exhibit 3 to Amendment No. 26 to this Schedule 13D.)

   8.        Form of Collateral Maintenance Agreement, dated November 22, 1994,
             between NationsBank and each of (i) Tallulah, Ltd.; (ii) the Sam
             Wyly Trusts; (iii) Brush Creek, Ltd.; (iv) the Charles Wyly
             Trusts; and (v) Maverick Entrepreneurs Fund, Ltd.  (Previously
             filed as Exhibit 4 to Amendment No. 26 to this Schedule 13D.)

   9.        Guaranty, executed as of November 22, 1994, by Tallulah, Ltd., the
             Sam Wyly Trusts, Brush Creek, Ltd., the Charles Wyly Trusts, and
             Even Wyly, in favor of NationsBank.  (Previously filed as Exhibit
             5 to Amendment No. 26 to this Schedule 13D.)
</TABLE>




- ----------------------------
*  Filed herewith.

<PAGE>
 
CUSIP NO. 594087-10-8               13/D/A                  Page 10 of 19 Pages


                                   EXHIBIT 1


         Pursuant to Rule 13d-1(f)(1)(iii) of Regulation 13D-G of the General
Rules and Regulations of the Securities and Exchange Commission under the
Securities Exchange Act of 1934, as amended, the undersigned agree that the
statement to which this Exhibit is attached is filed on behalf of each of them.



Date:  April 30, 1997                   /s/ SAM WYLY
                                        ----------------------------------------
                                        Sam Wyly


                                        /s/ CHARLES J. WYLY, JR.
                                        ----------------------------------------
                                            Charles J. Wyly, Jr.


                                        MAVERICK ENTREPRENEURS FUND, LTD.



                                        By:  /s/ SAM WYLY
                                             -----------------------------------
                                             Sam Wyly
                                             General Partner

                         
                                        By:  /s/ CHARLES J. WYLY, JR.
                                            ----------- ------------------------
                                            Charles J. Wyly, Jr.
                                            General Partner

<PAGE>
 
                                                                       EXHIBIT 6
                                                                       ---------

NationsBank                          Form of Amended and Restated Loan Agreement
================================================================================

                            Date November 22, 1996

                                    Between

- --------------------------------------------------------------------------------
Borrowers:                                            Bank:

_______________________________________               NationsBank of Texas, N.A.
_______________________________________               901 Main Street
_______________________________________               19th Floor
_______________________________________               Dallas, Texas 75202
_______________________________________
_______________________________________
_______________________________________
_______________________________________
8080 N. Central Expressway
Suite 1300
Dallas, Texas 75206
- --------------------------------------------------------------------------------

This Amended and Restated Loan Agreement ("Agreement") is made on the above date
by and between Borrowers and Bank.

1.   THE LOAN.

     A.  Bank agrees to lend and each Borrower severally agrees to borrow an
         amount not to exceed the amount set forth next to each such Borrower's
         name on Schedule I attached hereto (individually, a "Loan" and
         collectively, the "Loans") on the terms and conditions set forth
         herein and subject to the other limitations set forth herein and in
         the other Loan Documents (as defined herein). Each Loan will be
         evidenced by a Promissory Note in the form of Exhibit A attached
         hereto executed by the applicable Borrower, or any renewal thereof,
         with interest and principal payable as stated therein (the "Notes").
         The loans are renewals and restatements of (and not novations of)
         those certain loans from Bank to Borrower, as evidenced by the Loan
         Agreement dated November 22, 1994 between Borrowers and Bank.

     B.  Each Loan provides for a revolving line of credit under which a
         Borrower may from time to time borrow, repay and reborrow funds;
         provided, however, the aggregate amount of funds under any particular
         Loan that may be outstanding at any time shall in all events be subject
         to the limitations set forth on Schedule I and in the applicable Note
         and Collateral Maintenance Agreement (as defined herein). The Loans
         shall mature on November 22, 1998, unless sooner accelerated in
         accordance with the terms hereof.

     C.  Bank and Borrowers acknowledge and agree that each Borrower's
         individual liability hereunder shall be limited to the amount set forth
         on Schedule I hereto, plus interest accrued thereon, plus any fees and
         expenses owing hereunder.

2.   SECURITY. Each Loan is to be secured by a pledge of certain securities
     pursuant to a Pledge Agreement (the "Pledge Agreement") and a Collateral
     Maintenance Agreement (the "Collateral Maintenance Agreement"), each
     Agreement dated November 22, 1994 between a Borrower and Bank.

                                      -1-
<PAGE>
 
3.   REPRESENTATIONS AND WARRANTIES.

     Each Borrower represents and warrants as to itself to Bank as follows:

     A.  Good Standing. Such Borrower (other than ____________________________)
         is a trust duly established and validly existing under the laws of the
         State of Texas and has all powers and permits, consents and
         authorizations necessary to own and operate its properties and to carry
         on its business as presently conducted. ______________ ("________") is
         a limited partnership duly organized and validly existing under the
         laws of the State of Texas and has all powers and permits, consents and
         authorizations necessary to own and operate its properties and to carry
         on its business as presently conducted.

     B.  Trustee/General Partner. ________ is (i) the sole trustee ("Trustee")
         of such Borrower other than ____________ and (ii) the sole general
         partner ("General Partner") of ________.

     C.  Authority and Compliance. The Trustee, on behalf of such Borrower
         other than ________, and _________ have full power and authority to
         enter into this Agreement, to make the borrowings hereunder, to
         execute and deliver the Notes and the other Loan Documents (as defined
         herein) to which such Borrower is or may be a party and to incur the
         obligations provided for herein, all of which have been duly
         authorized by all proper and necessary action on the part of such
         Borrower. No consent or approval of any public authority or person is
         required as a condition to the validity of this Agreement or the Notes
         or the performance hereunder, and Borrower is in compliance with all
         laws and regulatory requirements to which it is subject.

     D.  Binding Agreement. This Agreement and the Notes constitute valid and
         legally binding obligations of Borrower, enforceable in accordance
         with their terms.

     E.  Financial Statements. The books and records of Borrower properly
         reflect such Borrower's financial condition, and there has been no
         material change in such Borrower's financial condition as represented
         in the financial statements dated June 30, 1996 delivered to Bank.
         
     F.  Litigation. There are no proceedings pending or, to the best knowledge
         of the Trustee, or _________, threatened before any court or
         administrative agency which will or may have a material adverse effect
         on the financial condition or operations of any such Borrower.

     G.  No Conflicting Agreements. There are no provisions of Borrower's (other
         than _____________________) trust agreement or ________'s agreement of
         limited partnership and no provisions of any existing agreement,
         mortgage, indenture or contract binding on Borrower or affecting its
         respective property or business, which would conflict with or in any
         way prevent the execution, delivery or carrying out of the terms of
         this Agreement and the Notes.

     H.  Taxes. All income taxes and other taxes due and payable by Borrower
         through the date of this Agreement have been paid prior to becoming
         delinquent.

     I.  Use of Proceeds. The proceeds of the Loans will be used by Borrower to
         (i) refinance in part the indebtedness of Borrowers currently owing to
         The First Boston Corporation and (ii) invest in such securities as
         such Borrower deems reasonably prudent. Such Borrower is not engaged
         in the business of extending credit for the purpose of purchasing or
         carrying "margin stock" as that term is defined in Regulation U of the
         Board of Governors of the Federal Reserve System; provided, however
         that proceeds of the Loans may also be used for the purpose of
         investing in other parties for the purpose of purchasing or carrying
         any such "margin stock," or for the purpose of reducing or retiring
         any indebtedness incurred for such purpose. Neither such Borrower, nor
         any person acting on behalf of Borrower, has taken or will take any
         action which might cause the Notes or this Agreement to violate
         Regulations G, T or U or any other regulation of the Board of
         Governors of the Federal Reserve

                                      -2-
<PAGE>
 
         System or violate the Securities Exchange Act of 1934 or any rule or
         regulation thereunder, in each case as now in effect or as the same may
         hereafter be in effect.

     J.  Continuation of Representations and Warranties. All representations
         and warranties made under this Agreement shall be deemed made at and
         as of the date hereof, and at and as of the date of any future advance
         under any Note.

4.   CLOSING CONDITIONS

     A.  Conditions to Initial Advance. The obligation of Bank to execute this
         Agreement and to make the initial advances hereunder shall be subject
         to the satisfaction of the following conditions precedent:

         1)    Loan Documents. Each of this Agreement, the Notes, and the
               reaffirmation of the Pledge Agreements and the Collateral
               Maintenance Agreements and such other ancillary documents and
               instruments in furtherance of the transaction contemplated herein
               as requested by Bank in connection with the Loans (the "Loan
               Documents") shall have been duly executed and delivered by the
               respective parties thereto, shall be in full force and effect and
               shall be in form and substance satisfactory to Bank.

         2)    Necessary Action. All action (whether trust, partnership or
               otherwise) necessary for the valid execution, delivery and
               performance by each Borrower of this Agreement and the other Loan
               Documents to which it is a party shall have been duly and
               effectively taken, and evidence thereof satisfactory to Bank
               shall have been provided to Bank.

         3)    Validity of Liens. The Pledge Agreements shall be effective to
               create in favor of Bank a legal, valid and enforceable first
               priority security interest in and lien upon the collateral
               described therein. All filings, recordings, deliveries of
               instruments and other actions necessary or desirable in the
               opinion of Bank to protect and preserve such security interests
               shall have been duly effected.

         4)    Payment of Fees. Bank shall have received the commitment fees in
               the aggregate amount of $30,000, as contemplated by Section 6
               below.

     B.  Conditions to All Borrowings. The obligation of Bank to make any
         future advance under any Note shall be subject to the satisfaction of
         the following conditions precedent:

         1)    Representations and Warranties. The representations and
               warranties of Borrowers contained herein and in any other Loan
               Documents shall be true and correct as of the date of which they
               were made and shall also be true and correct at and as of the
               time of the advance with the same effect as if made at and as of
               that time (except to the extent such representations and
               warranties expressly relate to an earlier date) and Bank shall
               have received a certificate of a Subagent (as defined herein), to
               such effect.

         2)    No Event of Default. No event of default hereunder or under any
               of the other Loan Documents shall have occurred and be continuing
               and Bank shall have received a certificate of a Subagent, to such
               effect.

         3)    No Legal Impediment. No change shall have occurred in any law or
               regulations thereunder or interpretations thereof that in the
               reasonable opinion of Bank would make it illegal for Bank to make
               such advance.

         4)    Proceedings and Documents. All proceedings in connection with the
               transactions contemplated hereby and the other Loan Documents
               shall be satisfactory in form and substance to Bank and Bank
               shall have received all information and documents as Bank may
               reasonably request.

                                      -3-
<PAGE>
 
5.   FEES. Each Borrower shall pay to Bank an annual commitment fee in the
     amount of 1/10 of one percent (0.10%) of the commitment amount set forth
     next to such Borrower's name on Schedule I, such fee to be due and payable
     on the date hereof and on each annual anniversary thereafter so long as the
     Loans are outstanding.

6.   AFFIRMATIVE COVENANTS. So long as any Borrower may borrow hereunder and
     until payment in full of the Notes and performance of all other obligations
     of Borrowers hereunder, each Borrower will:

     A.  Financial Statements. Maintain a system of accounting satisfactory to
         Bank and permit Bank's officers or authorized representatives to visit
         such Borrower's offices and inspect such Borrower's books of account
         and other records and make photocopies thereof at such reasonable times
         and as often as Bank may desire, and pay the reasonable fees and
         disbursements of any accountants or other agents of Bank selected by
         Bank for the foregoing purposes. Each Borrower agrees to provide Bank
         with the following statements and reports:

         1)    Within one hundred twenty (120) days after the end of each fiscal
               year, a balance sheet of such Borrower as of the end of such
               fiscal year, which shall be in reasonable detail, complete and
               correct in all material respects.

         2)    Within thirty (30) days after the end of each fiscal quarter and
               such other times as Bank may reasonably request, information or
               statements respecting each Borrower's trading activity in the
               collateral securing the Loans.

     B.  Existence and Compliance. Maintain its existence and comply with all
         laws, regulations and governmental requirements applicable to it or to
         any of its property, business and transactions.

     C.  Adverse Conditions or Events. Promptly advise Bank in writing of any
         condition, event or act which comes to its attention that would or
         might materially affect such Borrower's financial condition, Bank's
         rights in or to any collateral under this Agreement or the other Loan
         Documents, and of any litigation filed against such Borrower in which
         the potential loss reasonably could be anticipated to exceed $50,000.

     D.  Taxes. Pay all taxes as the same become due and payable unless timely
         extensions have been filed or the same are being contested in good
         faith by appropriate proceedings and adequate reserves are maintained.
         
     E.  Form U-1. If required by Bank, promptly furnish to Bank a statement
         that conforms with the requirements of Federal Reserve Form U-1 as
         referred to in Regulation U or in any other relevant Federal Reserve
         Form or Regulation provided for from time to time by the Board of
         Governors of the Federal Reserve System.

7.   NEGATIVE COVENANTS. So long as any Borrower may borrow hereunder and until
     payment in full of the Notes and performance of all other obligations of
     Borrowers hereunder, no Borrower will, without the prior written consent of
     Bank:

     A.  Transfer of Assets or Control. Permit any transfer of control or
         ownership of such Borrower.

     B.  Amendment of Trust Agreement/Partnership Agreement. No Borrower that is
         a trust shall permit any amendment or modification of its trust
         agreement or a change of the trustee thereof and ________ shall not
         permit any amendment or modification of its agreement of limited
         partnership or a change of the general partner.

8.   EVENTS OF DEFAULT. With respect to any particular Borrower, any one or more
     of the following events shall be deemed an event of default hereunder as to
     such Borrower:

                                      -4-
<PAGE>
 
     A.  Default shall be made in the payment of any installment of principal or
         interest upon any Note or any other obligation of a Borrower to Bank
         when due and payable, whether at maturity or otherwise and such default
         shall continue for three (3) business days thereafter; or

     B.  Default shall be made by a Borrower in the performance of any term,
         covenant or agreement contained herein, any of the other Loan
         Documents, or in any other security agreement, deed of trust, mortgage,
         assignment or other contract securing payment of any indebtedness of
         such Borrower to Bank and such default shall continue for thirty (30)
         calendar days following notice thereof being given by Bank to such
         Borrower or Agent; or

     C.  Any representation or warranty herein contained or in any financial
         statement, certificate, report or opinion or other agreement submitted
         to Bank in connection with the Loans or pursuant to the requirements of
         this Agreement shall prove to have been incorrect or misleading in any
         material respect when made; or

     D.  Default shall be made by a Borrower in the performance of any term or
         covenant in any agreement or instrument with any other party which
         would have a material adverse effect on such Borrower or Bank's rights
         hereunder or under the other Loan Documents, and such default is not
         remedied within the applicable cure period; or

     E.  A Borrower makes an assignment for the benefit of creditors, admits in
         writing its inability to pay its debts generally as they become due,
         files a petition in bankruptcy, is adjudicated insolvent or bankrupt,
         petitions or applies to any tribunal for the appointment of any
         receiver or any trustee for it or any substantial part of its
         property, commences any action relating to a Borrower or any
         reorganization, arrangement, readjustment of debt, dissolution or
         liquidation law or statute of any jurisdiction, whether now or
         hereafter in effect, or if there is commenced against a Borrower any
         such action, or a Borrower by any act indicates its consent to or
         approval of any trustee for such Borrower or any substantial part of
         its property, or suffers any such receivership or trustee to continue
         undischarged; or

     F.  Without the prior written consent of Bank, a Borrower that is a trust
         is at any time revoked, terminated or liquidated or ________ is
         dissolved or liquidated or ______________ dies.

     Upon the happening of any of the foregoing events of default which shall be
     continuing, Bank may at its option declare all outstanding principal and
     unpaid interest on the applicable Loan and any other indebtedness of the
     particular defaulting Borrower to Bank to be immediately due and payable,
     and Bank shall have no further obligation to fund advances hereunder to
     such Borrower. Upon such declaration by Bank, Bank shall have all rights
     and remedies available under the Loan Documents as well as those available
     at law or in equity. Notwithstanding the foregoing, upon the occurrence of
     an event of default described in Section 8.E. to any particular Borrower,
     the entire outstanding principal and unpaid interest on the Loan and all
     other indebtedness of such Borrower to Bank shall be immediately and
     automatically due and payable, without notice to such Borrower of any kind
     and Bank's obligation to make advances to such Borrower shall immediately
     terminate.

9.   APPOINTMENT OF AGENT. Each Borrower hereby appoints and designates
     _____________ as agent ("Agent") for and on behalf of such Borrower with
     respect to all matters arising under or in connection with this Agreement,
     the other Loan Documents and the applicable Loan hereunder including,
     without limitation, requesting and receiving advances, making payments on
     the applicable Loan, negotiating, executing and delivering modifications or
     renewals of the Loan Documents, receiving notices from Bank, delivering
     such other documents or instruments as the Bank may request in connection
     with the Loans, and generally communicating with Bank regarding such
     Borrower's obligations hereunder. Any funds advanced hereunder may be
     distributed to Agent who shall have responsibility to distribute such funds
     to the applicable Borrower. Agent is hereby granted full power and
     authority to bind each Borrower in respect of any term, condition, covenant
     or undertaking hereunder. Bank shall be entitled to rely on the appointment
     without any independent verification. Each Borrower hereby further appoints
     and designates each and any of Sharyl

                                      -5-
<PAGE>
 
     Robertson, Amy Phillips and Rena Alexander as subagents ("Subagents") for
     and on behalf of such Borrower to perform all administrative functions
     under the Loan Documents, including submitting advance requests, receiving
     and sending notices and delivering certificates on behalf of such Borrower.
     Borrowers shall not remove or otherwise change the Agent without the prior
     written consent of Bank. The appointment hereunder is coupled with an
     interest and irrevocable.

10.  MISCELLANEOUS.

     A.  Expenses. Each Borrower severally agrees to pay all out-of-pocket
         expenses of Bank in connection with this Agreement and the other Loan
         Documents and the collection of its applicable Note including, without
         limitation, the administration, enforcement and realization upon any
         collateral or guaranty. Each Borrower severally also agrees to pay all
         reasonable attorneys' fees and all expenses incurred in recording the
         documents securing its applicable Loan.

     B.  Cumulative Rights and No Waiver. Each and every right granted to Bank
         hereunder or under any other document delivered hereunder or in
         connection herewith, or allowed it by law or equity shall be
         cumulative of and may be exercised in addition to any and all other
         rights of Bank, and no delay in exercising any right shall operate as
         a waiver thereof, nor shall any single or partial exercise by Bank of
         any right preclude any other or future exercise thereof or the
         exercise of any other right. Any of the foregoing covenants and
         agreements may be waived by Bank but only in writing signed by a Vice
         President or higher level officer of Bank. Borrower expressly waives
         any presentment, demand, protest or other notice of any kind.

         No notice to or demand on a Borrower in any case shall, of itself,
         entitle such or any other Borrower to any other or further notice or
         demand in similar or other circumstances. No delay or omission by Bank
         in exercising any power or right hereunder shall impair any such right
         or power or be construed as a waiver thereof or any acquiescence
         therein, nor shall any single or partial exercise of any such power
         preclude other or further exercise thereof, or the exercise of any
         other right or power hereunder.

     C.  Maximum Interest. Notwithstanding any other provision contained in
         this Agreement, Bank does not intend to charge and no Borrower shall
         be required to pay any amount of interest or other fees or charges
         that is in excess of the maximum permitted by applicable law. Each
         Borrower agrees that during the full term hereof, the maximum lawful
         interest rate for the obligations hereunder as determined under Texas
         law shall be the indicated rate ceiling as specified in Article
         5069-1.04 of the V.A.T.S. Further, to the extent that any other lawful
         rate ceiling exceeds the rate ceiling so determined, then the higher
         rate ceiling shall apply. Any payment in excess of such maximum shall
         be refunded to the applicable Borrower or credited against principal,
         at the option of Bank.

     D.  Applicable Law. This Agreement and the rights and obligations of the
         parties hereunder shall be governed by and interpreted in accordance
         with the laws of the State of Texas (without regard to its conflicts
         of law provisions).

     E.  Notice. Except as otherwise provided in this Agreement, any notices or
         communications required or permitted hereunder shall be in writing and
         shall be deemed to have been given (i) the day it is personally
         delivered, if sent by hand or expedited delivery service, or (ii) five
         days after it is mailed, if sent by certified or registered mail.

     F.  Amendment. No modification, consent, amendment or waiver of any
         provision of this Agreement, nor consent to any departure by a Borrower
         therefrom, shall be effective unless the same shall be in writing and
         signed by a Vice President or higher level officer of Bank, and then
         shall be effective only in the specific instance and for the purpose
         for which given. This Agreement is binding upon each Borrower, its
         successors and assigns, and inures to be benefit of Bank, its
         successors and assigns.

                                      -6-
<PAGE>
 
     G.  ARBITRATION. ANY CONTROVERSY OR CLAIM BETWEEN OR AMONG THE PARTIES
         HERETO INCLUDING BUT NOT LIMITED TO THOSE ARISING OUT OF OR RELATING
         TO THIS AGREEMENT OR ANY RELATED AGREEMENTS OR INSTRUMENTS, INCLUDING
         ANY CLAIM BASED ON OR ARISING FROM AN ALLEGED TORT, SHALL BE
         DETERMINED BY BINDING ARBITRATION IN ACCORDANCE WITH THE FEDERAL
         ARBITRATION ACT (OR IF NOT APPLICABLE, THE APPLICABLE STATE LAW). THE
         RULES OF PRACTICE AND PROCEDURE FOR THE ARBITRATION OF COMMERCIAL
         DISPUTES OF JUDICIAL ARBITRATION AND MEDIATION SERVICES, INC.
         (J.A.M.S.), AND THE "SPECIAL RULES" SET FORTH BELOW. IN THE EVENT OF
         ANY INCONSISTENCY, THE SPECIAL RULES SHALL CONTROL. JUDGMENT UPON ANY
         ARBITRATION AWARD MAY BE ENTERED IN ANY COURT HAVING JURISDICTION. ANY
         PARTY TO THIS AGREEMENT MAY BRING AN ACTION, INCLUDING A SUMMARY OR
         EXPEDITED PROCEEDING, TO COMPEL ARBITRATION OF ANY CONTROVERSY OR
         CLAIM TO WHICH THIS AGREEMENT APPLIES IN ANY COURT HAVING JURISDICTION
         OVER SUCH ACTION.

         A.    SPECIAL RULES.  THE ARBITRATION SHALL BE CONDUCTED IN DALLAS, 
               -------------
               TEXAS AND ADMINISTERED BY J.A.M.S. WHO WILL APPOINT AN
               ARBITRATOR; IF J.A.M.S. IS UNABLE OR LEGALLY PRECLUDED FROM
               ADMINISTERING THE ARBITRATION, THEN THE AMERICAN ARBITRATION
               ASSOCIATION WILL SERVE. ALL ARBITRATION HEARINGS WILL BE
               COMMENCED WITHIN 90 DAYS OF THE DEMAND FOR ARBITRATION; FURTHER,
               THE ARBITRATOR SHALL ONLY, UPON A SHOWING OF CAUSE, BE PERMITTED
               TO EXTEND THE COMMENCEMENT OF SUCH HEARING FOR UP TO AN
               ADDITIONAL 60 DAYS.

         B.    RESERVATION OF RIGHTS.  NOTHING IN THIS AGREEMENT SHALL BE DEEMED
               ---------------------
               TO (I) LIMIT THE APPLICABILITY OF ANY OTHERWISE APPLICABLE
               STATUTES OF LIMITATION OR REPOSE AND ANY WAIVERS CONTAINED IN
               THIS AGREEMENT; OR (II) BE A WAIVER BY THE BANK OF THE PROTECTION
               AFFORDED TO IT BY 12 U.S.C. SEC. 91 OR ANY SUBSTANTIALLY
               EQUIVALENT STATE LAW; OR (III) LIMIT THE RIGHT OF THE BANK (A) TO
               EXERCISE SELF HELP REMEDIES SUCH AS (BUT NOT LIMITED TO) SETOFF,
               OR (B) TO FORECLOSE AGAINST ANY REAL OR PERSONAL PROPERTY
               COLLATERAL, OR (C) TO OBTAIN FROM A COURT PROVISIONAL OR
               ANCILLARY REMEDIES SUCH AS (BUT NOT LIMITED TO) INJUNCTIVE
               RELIEF, WRIT OF POSSESSION OR THE APPOINTMENT OF A RECEIVER. THE
               BANK MAY EXERCISE SUCH SELF HELP RIGHTS, FORECLOSE UPON SUCH
               PROPERTY, OR OBTAIN SUCH PROVISIONAL OR ANCILLARY REMEDIES
               BEFORE, DURING OR AFTER THE PENDENCY OF ANY ARBITRATION
               PROCEEDING BROUGHT PURSUANT TO THIS AGREEMENT. NEITHER THIS
               EXERCISE OF SELF HELP REMEDIES NOR THE INSTITUTION OR MAINTENANCE
               OF AN ACTION FOR FORECLOSURE OR PROVISIONAL OR ANCILLARY REMEDIES
               SHALL CONSTITUTE A WAIVER OF THE RIGHT OF ANY PARTY, INCLUDING
               THE CLAIMANT IN ANY SUCH ACTION, TO ARBITRATE THE MERITS OF THE
               CONTROVERSY OR CLAIM OCCASIONING RESORT TO SUCH REMEDIES.

     H.  NOTICE OF FINAL AGREEMENT.  THIS WRITTEN LOAN AGREEMENT REPRESENTS THE
         FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY
         EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF
         THE PARTIES.  THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
         PARTIES.

                                      -7-
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as of the date first above written.

NATIONSBANK OF TEXAS, N.A. _____________________________________TRUST


By:____________________________________            By:________________________
     Marta O. Engram                                 _______________, Trustee   
     Vice President, Private Banking                                            
                                              ___________________________ TRUST 

                                              By:_____________________________
                                                     _______________, Trustee

                                              ___________________________ TRUST


                                              By:_____________________________
                                                     _______________, Trustee

                                              ___________________________ TRUST


                                              By:_____________________________
                                                     _______________, Trustee


                                              ___________________________ TRUST

                                              
                                              By:_____________________________
                                                     _______________, Trustee



                                              ________________________________



                                              ___________________________, LTD.


                                              By:_____________________________

                                                 __________________,
                                                 General Partner

      The undersigned hereby acknowledges appointment as Agent for the Borrowers
hereunder.



                                                 _____________________________

                                                 __________________

                                      -8-
<PAGE>
 
                                  SCHEDULE I


Borrower                                            Maximum Loan Amount
- --------                                            -------------------


- ----------------------------                              $----------

- ----------------------------                              $----------

- ----------------------------                              $----------

- ----------------------------                              $----------
                                                          
- ----------------------------                              $----------
                                                          
- ----------------------------                              $----------
                                                          
- ----------------------------                              $----------
                                                          
                                                          $----------

                                      -9-


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