STERLING SOFTWARE INC
SC 13D/A, 1997-05-01
PREPACKAGED SOFTWARE
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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)


                            Sterling Software, Inc.
                               (Name of Issuer)


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


                                  859547-10-1
                                (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 32 Pages)
<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                        Page 2 of 32 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         499,179  
    OWNED BY   ---------------------------------------------------------------
      EACH      8      SHARED VOTING POWER
   REPORTING   
  PERSON WITH          300,000
               ---------------------------------------------------------------
                9      SOLE DISPOSITIVE POWER
               
                       2,299,179
               ---------------------------------------------------------------
                10     SHARED DISPOSITIVE POWER
               
                       300,000
- -------------------------------------------------------------------------------
 11     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
        2,599,179
- -------------------------------------------------------------------------------
 12     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
        SHARES*                                                             [_]
- ------------------------------------------------------------------------------- 
 13     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
        6.4%
- -------------------------------------------------------------------------------
 14     TYPE OF REPORTING PERSON*
 
        IN
================================================================================


                    * SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                        Page 3 of 32 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         700,833
    OWNED BY   ---------------------------------------------------------------
      EACH      8      SHARED VOTING POWER
   REPORTING   
  PERSON WITH          300,000
               ---------------------------------------------------------------
                9      SOLE DISPOSITIVE POWER
               
                       1,600,833
               ---------------------------------------------------------------
                10     SHARED DISPOSITIVE POWER
               
                       300,000
- -------------------------------------------------------------------------------
 11     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
        1,900,833
- -------------------------------------------------------------------------------
 12     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
        SHARES*                                                             [_]
- ------------------------------------------------------------------------------- 
 13     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
        4.8%
- -------------------------------------------------------------------------------
 14     TYPE OF REPORTING PERSON*
 
        IN
================================================================================


                    * SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                        Page 4 of 32 Pages

===============================================================================
 1      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
        Maverick Entrepreneurs Fund, Ltd.
        75-231945
- -------------------------------------------------------------------------------
 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)
 
        0.8%
- -------------------------------------------------------------------------------
 14     TYPE OF REPORTING PERSON*
 
        PN
================================================================================


                    * SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                        Page 5 of 32 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 Sterling Software, Inc., a Delaware corporation (the
"Company").

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

         This statement relates to the ownership of common stock, $.10 per share
("Common Stock"), of Sterling Software, Inc., a Delaware corporation.  The
address of the principal executive office of the Company is 300 Crescent Court,
Suite 1200, Dallas, Texas 75201.

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 limited partnership of
which Sam Wyly and Charles J. Wyly, Jr. are the sole general partners.

         The principal business and office address of 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 the
Company and Michaels Stores, Inc. Charles J. Wyly, Jr. is principally employed
as Vice Chairman of the Board of Directors of each of the Company and Michaels
Stores, Inc.

         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 Entrepreneurs 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
beneficially owned by the Reporting Persons is borrowings under revolving lines
of credit maintained by (i) the trusts described in Item 5 for which Sam Wyly is
trustee (the "Sam Wyly Trusts"), (ii) Tallulah, Ltd., (iii) the trusts described
in Item 5 for which Charles J. Wyly, Jr. is trustee (the "Charles Wyly Trusts"),
(iv) Brush Creek, Ltd., and (v) Maverick Entrepreneurs, with each of NationsBank
of Texas, N.A. ("NationsBank") and Citibank, N.A. ("Citibank").  See Item 6
below.

         The source of funds to hold a portion of the shares of Common Stock
beneficially owned by Maverick Entrepreneurs is borrowings under a loan
agreement between Maverick Entrepreneurs and Lehman Brothers Finance S.A.
("Lehman").  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 on market conditions and other factors that
they deem material to an investment decision, any of the Reporting Persons may
purchase additional shares of Common Stock 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)-(b)   Sam Wyly beneficially owns 2,599,179 shares, or approximately
6.4%, of the Common Stock of the Company. Sam Wyly beneficially owns (i)
1,800,000 of such shares by virtue of his ownership of options to purchase
Common Stock, (ii) 138,612 of such shares in his capacity as the sole general
partner of Tallulah, Ltd., (iii) 300,000 of such shares in his capacity as a
general partner of Maverick Entrepreneurs, (iv) 2,214 of such shares held for
his benefit pursuant to the Sterling Software, Inc. Savings and Security Plan
(the "Savings Plan"), and (v) an aggregate of 358,353 of such shares in his
capacity as the sole trustee of the Sam Wyly Trusts listed below:
<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                        Page 6 of 32 Pages

<TABLE>
<CAPTION>
                                                 Number of Shares
              Name of Trust                     Beneficially Owned
              -------------                     ------------------
<S>                                             <C>
 
1.  The Christiana Parker Wyly Trust                   34,890
2.  The Andrew David Sparrow Wyly Trust                34,890
3.  The Laurie L. Wyly Revocable Trust                 97,624
4.  The Lisa Wyly Revocable Trust                      95,425
5.  The Kelly Wyly Elliot Trust                        95,524
</TABLE>

         Sam Wyly possesses sole voting power with respect to 499,179 shares of
Common Stock, sole dispositive power with respect to 2,299,179 shares of Common
Stock and shared voting and shared dispositive power with respect to 300,000
shares of Common Stock held by Maverick Entrepreneurs.

         Charles J. Wyly, Jr. beneficially owns 1,900,833 shares, or
approximately 4.8%, of the Common Stock of the Company. Charles J. Wyly, Jr.
beneficially owns (i) 900,000 of such shares by virtue of his ownership of
options to purchase Common Stock, (ii) 256,574 of such shares in his capacity as
the sole general partner of Brush Creek, Ltd., (iii) 300,000 of such shares in
his capacity as a general partner of Maverick Entrepreneurs, (iv) 2,560 of such
shares held for his benefit pursuant to the Savings Plan, and (v) an aggregate
of 441,699 of such shares as the sole 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                    110,425
2.  The Charles J. Wyly, III Trust                    110,425
3.  The Emily Ann Wyly Trust                          110,424
4.  The Jennifer Lynn Wyly Trust                      110,425
</TABLE>

         Charles J. Wyly, Jr. possesses sole voting power with respect to
700,833 shares of Common Stock, sole dispositive power with respect to 1,600,833
shares of Common Stock and shared voting and shared dispositive power with
respect to 300,000 shares of Common Stock held by Maverick Entrepreneurs.

         Maverick Entrepreneurs beneficially owns and possesses sole voting and
sole dispositive power with respect to 300,000 shares, or approximately 0.8%, of
Common Stock of the Company.

         The Reporting Persons as a group beneficially own an aggregate of
4,200,012 shares of Common Stock, or approximately 10.2%, of the Common Stock of
the Company. The Reporting Persons as a group possess sole voting power with
respect to 1,500,012 shares of Common Stock and sole dispositive power with
respect to 4,200,012 shares of Common Stock.

         (c)       On March 31, 1997, Sam Wyly was granted options to purchase
an aggregate of 200,000 shares of Common Stock at an exercise price of $27.25
per share, which options will become exercisable on June 29, 1997. As a result,
Sam Wyly is deemed to have become the beneficial owner of an additional 200,000
shares of Common Stock on April 30, 1997.

         On March 31, 1997, Charles J. Wyly, Jr. was granted options to purchase
an aggregate of 100,000 shares of Common Stock at an exercise price of $27.25
per share, which options will become exercisable on June 29, 1997. As a result,
Charles J. Wyly, Jr. is deemed to have become the beneficial owner of an
additional 100,000 shares of Common Stock on April 30, 1997.

         Except as otherwise reflected in this Item 5, 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, Maverick Entrepreneurs entered into an agreement,
as amended on August 30, 1995, with Lehman providing for loans to Maverick
Entrepreneurs from time to time (the "Lehman Agreement"). In connection with the
Lehman Agreement, Maverick Entrepreneurs entered into various security
documents, as amended, (the "Security Documents") provided for in the Lehman
Agreement. Included in the Security Documents are documents that provide, in
general, that: (i) with respect to an aggregate of 300,000 shares of Common
Stock, if the market price of such shares of Common Stock on or before February
23, 1998, is less than $40.491, then Lehman, upon the request of Maverick
Entrepreneurs, will pay to Maverick Entrepreneurs the difference between such
market price and such specified amount at the time of such request, and if the
market price on February 23, 1998, is greater than $70.00, Maverick
Entrepreneurs will, on that date, pay to Lehman the difference between such
market price and such
<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                        Page 7 of 32 Pages

specified amount; and (ii) Maverick Entrepreneurs is required to pledge such
rights and an aggregate of 300,000 shares of Common Stock to secure its
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 were amended and restated effective as of November 22, 1996 to
provide that all amounts outstanding under the NationsBank Credit Facilities
mature on November 22, 1998.

         Each of (i) Tallulah, Ltd., (ii) Brush Creek, Ltd., (iii) the Sam Wyly
Trusts, and (iv) the Charles J. Wyly, Jr. Trusts also maintains a separate
revolving line of credit with Citibank (collectively, the "Citibank Credit
Facilities").  The obligations of each borrower to repay advances made under its
Citibank Credit Facility are full-recourse obligations that are secured by the
borrower's pledge of certain shares of Common Stock beneficially owned by the
Reporting Persons, as well as other securities and assets.  Each advance under a
Citibank Credit Facility bears interest at a rate of Citibank's announced base
rate, plus 1.0%, or at a Eurodollar-based rate, minus 1.0%, as elected by the
borrower.  Sam Wyly and Charles J. Wyly, Jr. have guaranteed the obligations of
Tallulah, Ltd. and Brush Creek, Ltd., respectively, under the applicable
Citibank Credit Facility, and certain of the beneficiaries of each of the Sam
Wyly Trusts, and the Charles J. Wyly Trusts, have guaranteed the obligations of
the respective trusts under the applicable Citibank Credit Facility.  The
Citibank Credit Facilities were amended effective as of December 16, 1996 to
provide that all amounts outstanding under the Citibank Credit Facilities will
mature on January 31, 1998.

         The foregoing descriptions of the agreements relating to the Lehman
Agreement, the Security Documents, the NationsBank Credit Facilities and the
Citibank 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.

<TABLE>
<CAPTION>
 
Item 7.    Material to be Filed as Exhibits.
           --------------------------------
           <C>            <S> 
           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 Maverick Entrepreneurs Fund, Ltd. and
                          Lehman Brothers Finance S.A., including Form of
                          Promissory Note.  (Previously filed as Exhibit 2
                          to Amendment No. 21 to this Schedule 13D.)

           Exhibit 2.2    Form of Amendment Agreement dated as of August 30,
                          1995, between Maverick Entrepreneurs Fund, Ltd.,
                          and Lehman Brothers Finance S.A., including Form
                          of Promissory Note.  (Previously filed as Exhibit
                          7 to Amendment No. 24 to this Schedule 13D.)

           Exhibit 3.     Form of Guarantee of Lehman Brothers Holdings Inc.
                          (Previously filed as Exhibit 5 to Amendment No. 21
                          to this Schedule 13D.)

           Exhibit 4.     Form of Pledge Agreement, dated as of February 23,
                          1995, between Maverick Entrepreneurs Fund, Ltd.
                          and Lehman Brothers Finance S.A.  (Previously
                          filed as Exhibit 6 to Amendment No. 21 to this
                          Schedule 13D.)

           Exhibit 5.1    Revised Option Transaction dated August 30, 1995,
                          between Maverick Entrepreneurs Fund, Ltd., and
                          Lehman Brothers Finance S.A.  (Previously filed as
                          Exhibit 8 to Amendment No. 24 to this Schedule
                          13D.)

           Exhibit 5.2    Revised Option Transaction dated August 30, 1995,
                          between Maverick Entrepreneurs Fund, Ltd., and
                          Lehman Brothers Finance S.A.  (Previously filed as
                          Exhibit 9 to Amendment No. 24 to this Schedule
                          13D.)

           Exhibit 6.*    Form of Amended and Restated Loan Agreement, dated
                          November 22, 1996, among NationsBank and each of
                          (i) Sam Wyly Trusts and Tallulah, Ltd.; (ii) the
                          Charles Wyly Trusts and Brush Creek Limited; and
                          (iii) Maverick Entrepreneurs Fund, Ltd.

           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.)
</TABLE> 

- ------------------------------
*   Filed herewith.
<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                        Page 8 of 32 Pages

<TABLE> 
           <C>            <S> 
           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 Evan Wyly, in
                          favor of NationsBank.  (Previously filed as
                          Exhibit 5 to Amendment No. 26 to this Schedule
                          13D.)

           Exhibit 10.1   Form of Credit Agreement, dated as of December 16,
                          1994, as amended, between Citibank and each of (i)
                          Tallulah, Ltd.; (ii) the Sam Wyly Trusts; (iii)
                          Brush Creek, Ltd.; and (iv) the Charles Wyly
                          Trusts.  (Previously filed as Exhibit 6 to
                          Amendment No. 26 to this Schedule 13D.)

           Exhibit 10.2*  Form of Second Amendment to Credit Agreement,
                          dated as of December 16, 1996, between Citibank
                          and each of (i) Tallulah, Ltd.; (ii) the Sam Wyly
                          Trusts; (iii) Brush Creek, Ltd; and (iv) the
                          Charles Wyly Trusts.

           Exhibit 11.1   Form of Pledge Agreement, dated as of December 16,
                          1994, as amended, between Citibank and each of (i)
                          Tallulah, Ltd.; (ii) the Sam Wyly Trusts; (iii)
                          Brush Creek, Ltd.; and (iv) the Charles Wyly
                          Trusts.  (Previously filed as Exhibit 7 to
                          Amendment No. 26 to this Schedule 13D.)

           Exhibit 11.2*  Form of Third Amendment to Pledge Agreement, dated
                          as of December 16, 1996, between Citibank and each
                          of (i) Tallulah, Ltd.; (ii) the Sam Wyly Trusts;
                          (iii) Brush Creek, Ltd.; and (iv) the Charles Wyly
                          Trusts.

           Exhibit 12.    Form of Guaranty Agreement, dated as of December
                          16, 1994, in favor of Citibank by (i) the general
                          partner of Tallulah, Ltd.; (ii) the general
                          partner of Brush Creek, Ltd.; and (iii) certain of
                          the beneficiaries of each of the Sam Wyly Trusts
                          and the Charles Wyly Trusts.  (Previously filed as
                          Exhibit 8 to Amendment No. 26 to this Schedule
                          13D.)

           Exhibit 13.*   Form of Amended and Restated Promissory Note,
                          dated as of December 16, 1996, between Citibank
                          and each of (i) Tallulah, Ltd.; (ii) the Sam Wyly
                          Trusts; (iii) Brush Creek, Ltd.; and (iv) the
                          Charles Wyly Trusts.
</TABLE>

- ------------------------------
*   Filed herewith.
<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                        Page 9 of 32 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.



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>
 
CUSIP NO. 859547-10-1            13D/A                       Page 10 of 32 Pages

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
 
Exhibit No.
- -----------
<C>          <S>
       1.*   Agreement pursuant to Rule 13d-1(f)(1)(iii).

       2.1   Form of Loan Agreement dated as of February 23, 1995 between
             Maverick Entrepreneurs Fund, Ltd. and Lehman Brothers Finance
             S.A., including Form of Promissory Note.  (Previously filed as
             Exhibit 2 to Amendment No. 21 to this Schedule 13D.)

       2.2   Form of Amendment Agreement dated as of August 30, 1995, between
             Maverick Entrepreneurs Fund, Ltd., and Lehman Brothers Finance
             S.A., including Form of Promissory Note.  (Previously filed as
             Exhibit 7 to Amendment No. 24 to this Schedule 13D.)

       3.    Form of Guarantee of Lehman Brothers Holdings Inc.  (Previously
             filed as Exhibit 5 to Amendment No. 21 to this Schedule 13D.)

       4.    Form of Pledge Agreement, dated as of February 23, 1995, between
             Maverick Entrepreneurs Fund, Ltd. and Lehman Brothers Finance S.A.
             (Previously filed as Exhibit 6 to Amendment No. 21 to this
             Schedule 13D.)

       5.1   Revised Option Transaction dated August 30, 1995, between Maverick
             Entrepreneurs Fund, Ltd., and Lehman Brothers Finance S.A.
             (Previously filed as Exhibit 8 to Amendment No. 24 to this
             Schedule 13D.)

       5.2   Revised Option Transaction dated August 30, 1995, between Maverick
             Entrepreneurs Fund, Ltd., and Lehman Brothers Finance S.A.
             (Previously filed as Exhibit 9 to Amendment No. 24 to this
             Schedule 13D.)

       6.*   Form of Amended and Restated Loan Agreement, dated November 22,
             1996, among NationsBank and each of (i) Sam Wyly Trusts and
             Tallulah, Ltd.; (ii) the Charles Wyly Trusts and Brush Creek
             Limited; and (iii) Maverick Entrepreneurs Fund, Ltd.

       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
             Evan Wyly, in favor of NationsBank.  (Previously filed as Exhibit
             5 to Amendment No. 26 to this Schedule 13D.)

       10.1  Form of Credit Agreement, dated as of December 16, 1994, as
             amended, between Citibank and each of (i) Tallulah, Ltd.; (ii) the
             Sam Wyly Trusts; (iii) Brush Creek, Ltd.; and (iv) the Charles
             Wyly Trusts.  (Previously filed as Exhibit 6 to Amendment No. 26
             to this Schedule 13D.)

       10.2* Form of Second Amendment to Credit Agreement, dated as of December
             16, 1996, between Citibank and each of (i) Tallulah, Ltd.; (ii)
             the Sam Wyly Trusts; (iii) Brush Creek, Ltd; and (iv) the Charles
             Wyly Trusts.

       11.1  Form of Pledge Agreement, dated as of December 16, 1994, as
             amended, between Citibank and each of (i) Tallulah, Ltd.; (ii) the
             Sam Wyly Trusts; (iii) Brush Creek, Ltd.; and (iv) the Charles
             Wyly Trusts.  (Previously filed as Exhibit 7 to Amendment No. 26
             to this Schedule 13D.)

       11.2* Form of Third Amendment to Pledge Agreement, dated as of December
             16, 1996, between Citibank and each of (i) Tallulah, Ltd.; (ii)
             the Sam Wyly Trusts; (iii) Brush Creek, Ltd.; and (iv) the Charles
             Wyly Trusts.

       12.   Form of Guaranty Agreement, dated as of December 16, 1994, in
             favor of Citibank by (i) the general partner of Tallulah, Ltd.;
             (ii) the general partner of Brush Creek, Ltd.; and (iii) certain
             of the beneficiaries of each of the Sam Wyly Trusts and the
             Charles Wyly Trusts.  (Previously filed as Exhibit 8 to Amendment
             No. 26 to this Schedule 13D.)

       13.*  Form of Amended and Restated Promissory Note, dated as of December
             16, 1996, between Citibank and each of (i) Tallulah, Ltd.; (ii)
             the Sam Wyly Trusts; (iii) Brush Creek, Ltd.; and (iv) the Charles
             Wyly Trusts.
</TABLE>

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

<PAGE>
 
CUSIP NO. 859547-10-1            13D/A                       Page 11 of 32 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-

<PAGE>
 
                                                                    EXHIBIT 10.2
                                                                    ------------


         THIS SECOND AMENDMENT TO CREDIT AGREEMENT (the "Second Amendment") 
                                                         ---------------- 
dated as of December 16, 1996, is among __________ (the "Borrower"), and 
                                                         --------
CITIBANK, N.A., a national banking association (the "Bank").
                                                     ----

                               W I T N E S S E T H
                               - - - - - - - - - -

         WHEREAS, the Borrower and the Bank entered into that certain Credit
Agreement dated as of December 16, 1994, as amended by the First Amendment to
Credit Agreement dated as of September 30, 1996 (the "Credit Agreement")
                                                      ----------------
pursuant to which the Bank agreed to made certain Advances to the Borrower; and

         WHEREAS, the Borrower has requested and the Bank has agreed to amend
certain provisions of the Credit Agreement;

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants herein contained, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

         Section 1. Defined Terms. All capitalized terms which are defined in
                    -------------
the Credit Agreement, but which are not defined in this Second Amendment, shall
have the same meanings as defined in the Credit Agreement. Unless otherwise
indicated, all section references in this Second Amendment refer to the Credit
Agreement.

         Section 2. Amendments to the Credit Agreement.
                    ----------------------------------

                2.1  Section 1.01 is amended by deleting in its entirety the
                     definition of "Michaels".

                2.2  Section 1.01 is amended by replacing in its entirety the
                     following definition:

                     "Termination Date" means January 31, 1998, or the earlier
                     date of termination in whole of the Commitment pursuant to
                     Section 2.05, Section 2.09 or Section 7.01.

                2.3  Section 1.01 is amended by replacing in its entirety the
                     following definition:

                     "Note" means that certain Amended and Restated Promissory
                     Note of the Borrower payable to the order of the Bank,
                     dated as of December 16, 1996, evidencing the aggregate
                     indebtedness of the Borrower to the Bank resulting from the
                     Advances and delivered to the Bank pursuant
<PAGE>
 
             to Article III, as the same may be amended, extended,
             renewed or otherwise modified from time to time.

        2.4  Section 3.02 is restated in its entirety to read as follows:

                    v(c)    That in no event shall the aggregate of all
             advances made by the Bank to the Borrower:

                            i.       exceed $4,260,000.00 where such
                                     advances are made against
                                     Collateral consisting of Sterling
                                     stock; and
                            
                            ii.      exceed $4,260,000.00 where such
                                     advances are made against
                                     Collateral consisting of
                                     Sterling Commerce stock.

        2.5  Section 5.01(d)(ii) is restated in its entirety to read as follows:

             "as soon as available and in any event within sixty (60) days after
             the end of each fiscal quarter of Sterling and Sterling Commerce,
             the 10-Q Report of Sterling and Sterling Commerce, respectively;"

        2.6  Sections 5.02(b) is restated in its entirety to read as follows:

                     (b)    Liquidity. Permit the current market value of the
                            ---------
             unpledged Cash and Cash Equivalents and/or Readily Marketable
             Securities (excluding any securities issued by Sterling or Sterling
             Commerce), but including interests in Maverick of the Borrower and
             the Guarantor, collectively, to be less than fifteen percent (15%)
             of the Commitment for a period of ten (10) consecutive Business
             Days; provided, that it is expressly contemplated that within such
             period of ten (10) consecutive Business Days the Borrower shall
             have the ability to increase such current market value of the
             unpledged Cash and Cash Equivalents and/or Readily Marketable
             Securities (excluding any securities issued by Sterling or Sterling
             Commerce), but including interests in Maverick in accordance with
             the provisions of subsection (ii) of Section 6.01.

        2.7  Section 5.02(c) is deleted in its entirety.

        2.8  Section 6.01(b) is restated in its entirety to read as follows:

                                      -2-
<PAGE>
 
                 i.   the value of the Sterling stock shall be excluded
                      for such period of time as the share price of
                      Sterling stock is below $10.00 per share; and
                      
                 ii.  the value of the Sterling Commerce stock shall be
                      excluded for such period of time as the share
                      price of Sterling Commerce stock is below $10.00
                      per share.

         2.9  Section 7.01 is amended to add the following after subparagraph
              (l):

              "or (m) The Borrower fails to execute and deliver the following
              documents, or complete the required actions:

              (a) The Amended and Restated Promissory Note is duly executed
                  by the Borrower in the form of Exhibit A attached hereto;

              (b) The Third Amendment to the Pledge Agreement is duly
                  executed by the Borrower; and

              (c) All outstanding fees and expenses of the Bank."

  Section 3.  Representations and Warranties. The Borrower hereby affirms
              ------------------------------ 
that as of the date of execution and delivery of this Second Amendment, except
as affected by the transactions contemplated in this Second Amendment, all of
the representations and warranties contained in the Credit Agreement are true
and correct in all material respects as though made on and as of the date hereof
and no Event of Default shall have occurred and be continuing.

  Section 4.  Effectiveness. Upon the execution hereof by the Borrower and the
              -------------
Bank, this Second Amendment shall be effective as of the date first written
above.

  Section 5.  Reference to and Effect on Credit Agreement.
              -------------------------------------------

          (a) On or after the date first written above, each reference in the
  Credit Agreement to "this Agreement," "hereunder," "hereof," "herein" or words
  of like import, and each reference to the Credit Agreement in any certificate
  or other document or instrument delivered in connection therewith, shall mean
  and be a reference to the Credit Agreement as amended hereby.

          (b) Except as specifically amended above, the Credit Agreement is and
  shall continue to be in full force and effect and is hereby ratified and
  confirmed.

  Section 6.  Cost, Expenses and Taxes. The Seller agrees to pay on demand all
              ------------------------ 
reasonable costs and expenses of the Bank in connection with the preparation,
execution and delivery of this Second Amendment and any other documents to be
delivered in connection

                                      -3-
<PAGE>
 
herewith including, without limitation, the reasonable fees and out-of-pocket
expenses of counsel for the Bank with respect thereto.

  Section 7.  Counterparts. This Second Amendment may be executed by one or
              ------------ 
more of the parties hereto in any number of separate counterparts, and all of
such counterparts taken together shall be deemed to constitute one and the same
instrument.

  Section 8.  No Oral Agreement. THIS WRITTEN SECOND AMENDMENT AND THE OTHER
              -----------------
DOCUMENTS EXECUTED IN CONNECTION HEREWITH REPRESENT 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.

  Section 9.  GOVERNING LAW.  THIS SECOND AMENDMENT SHALL BE GOVERNED BY, AND
              ------------- 
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

                                      -4-
<PAGE>
 
         IN WITNESS WHEREOF, the parties hereto have caused this Second
Amendment to be duly executed effective as of the date first written above.

Borrower:



                                            By:
                                               -------------------------------




Witness:                                    By:
                                               -------------------------------
                                            Name:
                                                 -----------------------------



Bank:                                 CITIBANK, N.A.



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

                                      -5-

<PAGE>
 
                                                                  EXHIBIT 11.2
                                                                  ------------ 




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



                                THIRD AMENDMENT

                                      to

                               PLEDGE AGREEMENT

                                     among

                               ----------------,
                                as the Borrower


                                      and

                                CITIBANK, N.A.


                       Effective as of December 16, 1996



================================================================================
<PAGE>
 
         THIS THIRD AMENDMENT TO PLEDGE AGREEMENT (the "Third Amendment") dated
                                                        ---------------
as of December 16, 1996, is among_________________(the "Borrower"), and 
                                                        --------
CITIBANK, N.A., a national banking association (the "Bank").
                                                     ----
                              W I T N E S S E T H
                              - - - - - - - - - -

         WHEREAS, the Borrower and the Bank entered into that certain Credit
Agreement dated as of December 16, 1994, as amended from time to time (the
"Credit Agreement") pursuant to which the Borrower and the Bank also entered
 ----------------
into that certain Pledge Agreement dated as of December 16, 1994 as amended by
the First Amendment to Pledge Agreement dated as of May 5, 1995 and further
amended by the Second Amendment to Pledge Agreement dated as of September 30,
1996 (the "Pledge Agreement") pursuant to which the Bank agreed to made certain
           ---------------- 
Advances to the Borrower; and

         WHEREAS, the Borrower has requested and the Bank has agreed to amend
certain provisions of the Pledge Agreement and the Credit Agreement;

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants herein contained, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

         Section 1. Defined Terms. All capitalized terms which are defined in
                    -------------
the Pledge Agreement or the Credit Agreement, but which are not defined in this
Third Amendment, shall have the same meanings as defined in the Pledge Agreement
or the Credit Agreement. Unless otherwise indicated, all section references in
this Third Amendment refer to the Pledge Agreement.

         Section 2. Amendments to the Pledge Agreement.
                    -----------------------------------

         (1) Schedule I to the Pledge Agreement is hereby deleted in its
entirety and Schedule I hereto is inserted in lieu thereof.

         (2) Section 16 of the Pledge Agreement is hereby deleted in its
entirety and replaced by the following:

         Continuing Security Interest; Assignments under Credit Agreement. This
         ----------------------------------------------------------------
Agreement shall create a continuing security interest in the Pledged Collateral
and shall (a) remain in full force and effect until the later of (i) the payment
in full in cash of the obligations and all other amounts payable under this
Agreement and (ii) the expiration or termination of the Commitment, (b) be
binding upon the Borrower and the heirs, executors, administrators, legal
representatives, successors and assigns of the Borrower, and (c) inure to the
benefit of, and be enforceable by, the Bank and the successors, transferees and
assigns of the Bank. Without limiting the generality of the foregoing clause (c)
and subject to the provisions of the Credit Agreement, (a) the Bank, without any
notice to or consent of the Borrower, may sell participations to one or more
persons or entities in or to all or any portion of the Bank's

                                      -1-
<PAGE>
 
rights and obligations under the Credit Agreement (including, but not limited
to, all or any portion of the Commitment, the Advances and the Note), and (b)
the Bank, with the prior written consent of the Borrower, which consent shall
not be unreasonably withheld, may assign, syndicate or otherwise transfer all or
any portion of the Bank's rights and obligations under the Credit Agreement
(including, but not limited to, all or any portion of the Commitment, the
Advances and the Note) to any other person or entity, and such other person or
entity shall thereupon become vested with all the benefits in respect thereof
granted to the Bank herein or otherwise; provided that, any other provision of
this Agreement to the contrary notwithstanding, the Bank may at any time create
a security interest in all or any portion of the Bank's rights under the Credit
Agreement (including, but not limited to, the Advances owing to the Bank and the
Note held by the Bank) in favor of any Federal Reserve Bank in accordance with
Regulation A of the Board of Governors of the Federal Reserve System. Upon the
later of the payment in full in cash of the Obligations and all other amounts
payable under this Agreement and the expiration or termination of the
Commitment, the security interest granted hereby shall terminate. Upon any such
termination, the Bank will, at the Borrower's expenses, (i) return stock
certificates evidencing ownership in Sterling Commerce and Sterling as shall not
have been sold or otherwise applied pursuant to the terms hereof to the then
acting transfer agent for Sterling Commerce or Sterling, as appropriate, with
instructions that restrictive legends by reapplied to such certificates after
which such certificates are to be returned to the Borrower or its designee by
the transfer agent and (i) return to the Borrower all other the Pledged
Collateral as shall not have been sold or otherwise applied pursuant to the
terms hereof and execute and deliver to the Borrower such documents as the
Borrower shall reasonably request to evidence such termination.

         Section 3. Representations and Warranties. The Borrower hereby affirms
                    ------------------------------
that as of the date of execution and delivery of this Third Amendment, all of
the representations and warranties contained in the Credit Agreement and the
Pledge Agreement are true and correct in all material respects as though made on
and as of the date hereof and no Event of Default shall have occurred and be
continuing.

         Section 4. Confirmation. The provisions of the Pledge Agreement (as
                    ------------
amended by this Third Amendment) shall remain in full force and effect in
accordance with their terms following the effectiveness of this Third Amendment.

         Section 5. Ratification and Affirmation of Guarantors. The Guarantor
                    ------------------------------------------
under the Credit Agreement hereby expressly (i) acknowledges the terms of this
Third Amendment and the amendment of even date herewith to the Credit Agreement,
(ii) ratifies and affirms his obligations under the Guaranty Agreement, (iii)
acknowledges, renews and extends his continued liability under said Guaranty
Agreement and agrees that said Guaranty Agreement remains in full force and
effect.

         Section 6. Counterparts. This Third Amendment may be executed by one or
                    ------------
more of the parties hereto in any number of separate counterparts, and all of
such counterparts taken together shall be deemed to constitute one and the same
instrument.

                                      -2-
<PAGE>
 
         Section 7.  No Oral Agreement. THIS WRITTEN THIRD AMENDMENT AND THE
                     -----------------
OTHER DOCUMENTS EXECUTED IN CONNECTION HEREWITH REPRESENT 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.

         Section 8.5 GOVERNING LAW. THIS THIRD AMENDMENT SHALL BE GOVERNED BY,
                     -------------
AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

                                      -3-
<PAGE>
 
         IN WITNESS WHEREOF, the parties hereto have caused this Third Amendment
to be duly executed effective as of the date first written above.



BORROWER:                       
                                -----------------------------------



                                By:
                                   --------------------------------




WITNESS:                        By:
                                   --------------------------------
 
                                Name:
                                     ------------------------------ 

                                      -4-

<PAGE>
 
                                                                     EXHIBIT 13
                                                                     ----------

                     AMENDED AND RESTATED PROMISSORY NOTE

$                                                       Dated: December 16, 1996
 --------------

         FOR VALUE RECEIVED, the undersigned, _________________________ (the
"Borrower"), _________________________, HEREBY PROMISES TO PAY to the order of
 --------
CITIBANK, N.A., a national banking association (the "Bank"), on or before the
                                                     ----
Termination Date, the principal sum of _______________ ($________) or, if less,
the aggregate principal amount of all Advances made by the Bank to the Borrower
pursuant to the Credit Agreement (as defined below) outstanding on the
Termination Date.

         The Borrower promises to pay interest on the principal amount of each
Advance from the date of such Advance until such principal amount is paid in
full, at such interest rates, and payable at such times, as are specified in the
Credit Agreement.

         Both principal and interest are payable in lawful money of the United
States of America to the Bank at One Citicorp Center, 153 East 53rd Street, New
York, New York 10043 (or at such other address as shall be designated by the
Bank in a written notice to the Borrower), in same day funds. Each Advance made
by the Bank to the Borrower and the maturity thereof, and all payments made on
account of the principal amount thereof, shall be recorded by the Bank and,
prior to any transfer hereof, endorsed on the grid attached hereto which is a
part of this Amended and Restated Promissory Note.

         This Amended and Restated Promissory Note is the Note referred to in
and is entitled to the benefits of the Credit Agreement dated as of December 16,
1994, as amended by the First Amendment to Credit Agreement dated as of
September 30, 1996, and as further amended by the Second Amendment to Credit
Agreement dated as of December 16, 1996 among the Borrower and the Bank
thereunder (such Credit Agreement as the same may be amended or supplemented
from time to time, the "Credit Agreement") and is issued in replacement of that
                        ----------------
certain Promissory Note dated December 16, 1994, executed by the Borrower and
made payable to Bank (the "Prior Note"). Nothing herein contained shall be
                           ----------
construed (a) to be a novation of the Prior Note or (b) to release, cancel,
terminate or otherwise impair the status or priority of the liens or security
for the Prior Note. Further, the Borrower acknowledges and agrees that this Note
shall not be considered a new contract, and that all rights, titles, powers,
liens, security interests and estates created by or under any security document
or other agreement executed in connection with the Credit Agreement or securing
the Prior Note shall continue without interruption in full force and effect. The
Credit Agreement, among other things, contains provisions for acceleration of
the maturities hereof upon the happening of certain stated events and also for
the prepayments on account of principal hereof prior to the maturity hereof upon
the terms and conditions therein specified. Capitalized terms used in this Note
have the respective meanings assigned to them in the Credit Agreement.
<PAGE>
 
         This Amended and Restated Promissory Note shall be governed by, and
construed in accordance with, the laws of the State of New York. The Borrower
hereby submits to the exclusive jurisdiction of the United States District Court
for the Southern District of New York and of any court of the State of New York
sitting in New York City for purposes of all legal proceedings arising out of or
relating to the Credit Agreement, this Amended and Restated Promissory Note, any
other Loan Document or any transactions contemplated hereby or thereby. The
Borrower irrevocably waives, to the fullest extent permitted by law, any
objection which the Borrower may now or hereafter have to the laying of the
venue of any such proceeding brought in such a court and any claim that any such
proceeding brought in such a court has been brought in an inconvenient forum.
Notwithstanding the preceding two sentences, the Bank retains the right to bring
any suit, action or proceeding seeking to enforce any provision of, or based on
any matter arising out of or in connection with, the Credit Agreement, this
Amended and Restated Promissory Note, any other Loan Document or any of the
transactions contemplated thereby or thereby in any court that has jurisdiction
over the parties and subject matter.

         This Amended and Restated Promissory Note is issued pursuant to and is
entitled to the benefits of the Credit Agreement.

THE BORROWER:
                                          -------------------------------------
                                                         
                                      By: 
                                         --------------------------------------



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

                                      -2-
<PAGE>
 
                       ADVANCES AND PAYMENTS OF PRINCIPAL
<TABLE> 
<CAPTION> 


======================================================================================================================
                                                          Amount of              Unpaid       
                    Amount of         Maturity of       Principal Paid         Principal      
     Date            Advance            Advance           or Unpaid             Balance        Notation Made By
- ----------------------------------------------------------------------------------------------------------------------
     <S>            <C>               <C>               <C>                    <C>             <C> 
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======================================================================================================================
</TABLE> 

                                      -3-


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