Document:

<PAGE>   1
                                                                     EXHIBIT 4.1

                              [DIGITALTHINK LOGO]

                                  COMMON STOCK

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

                                     NUMBER

                         INCORPORATED UNDER THE LAWS OF
                             THE STATE OF DELAWARE

                                  COMMON STOCK

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

                                     SHARES

                                SEE REVERSE FOR
                              CERTAIN DESCRIPTIONS

                               CUSIP

THIS CERTIFIES THAT
                    -------------------------------------------

IS THE OWNER OF
                    -------------------------------------------

           FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK,
                       PAR VALUE OF $0.001 PER SHARE, OF

                               DIGITALTHINK, INC.

transferable on the books of the Corporation in person or by duly authorized
attorney upon surrender of this Certificate properly endorsed. This Certificate
is not valid until countersigned by the Transfer Agent and Registrar.

     Witness the facsimile seal of the Corporation and the facsimile signatures
of its duly authorized officers.

                             [CERTIFICATE OF STOCK]

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

                                     [SEAL]

/s/ ADAM D. LEVY                                   /s/ PETER J. GOETTNER
------------------------                           ------------------------
Adam D. Levy                                       Peter J. Goettner
Assistant Secretary

COUNTERSIGNED AND REGISTERED:
     NORWEST BANK MINNESOTA, N.A.
          TRANSFER AGENT AND REGISTRAR

By:
   ----------------------------
     Authorized Signature

                               DIGITALTHINK, INC.

     The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>                                          <C>
TEN COM - as tenants in common               UNIF TRANS MIN ACT:______Custodian_______
TEN ENT - as tenants by the entireties                          (Cust)         (Minor)
 JT TEN - as joint tenants with
          right of survivorship                   under Uniform Transfers to Minors
          not as tenants in common                Act______________________________
                                                                (State)
</TABLE>

     Additional abbreviations may also be used though not in the above list.

FOR VALUE RECEIVED, ______________________ hereby sell, assign and transfer unto

PLEASE INDENT SOCIAL SECURITY OR OTHER
  IDENTIFYING NUMBER OF ASSIGNEE

________________________________________________________________________________

________________________________________________________________________________
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

________________________________________________________________________________

________________________________________________________________________________

__________________________________________________________________________Shares

of capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint ________________________________ Attorney to
transfer the said stock on the books of the within named Company with full
power of substitution in the premises.

Dated
      --------------------

                             X
                             --------------------------------------------------

                             X
                             --------------------------------------------------
                             NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT MUST
                             CORRESPOND WITH THE NAME(S) AS WRITTEN UPON THE
                             FACE OF THE CERTIFICATE IN EVERY PARTICULAR,
                             WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE
                             WHATSOEVER.

SIGNATURE(S) GUARANTEED

By:
_______________________________________________________

THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR
INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS
AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE
GUARANTEE MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15.

KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN, OR DESTROYED, THE
CORPORATION MAY REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE ISSUANCE OF A
REPLACEMENT CERTIFICATE.1165(e) PLAN ADOPTION AGREEMENT

                   MASTER DEFINED CONTRIBUTION RETIREMENT PLAN

                     AMENDED EFFECTIVE AS OF JANUARY 1, 1998

                                                                               1

<PAGE>

                    BY  executing  this  Adoption   Agreement  the  Employer  is
adopting a profit sharing plan with optional Section 1165(e)  provisions for the
benefit of its  Employees.  The  Employer's  Plan is comprised of: (i) the Banco
Popular de Puerto Rico Master Defined  Contribution  Retirement Plan Document or
the Employer's  Defined  Contribution  Retirement Plan Document;  (ii) the Banco
Popular de Puerto Rico Master Defined Contribution  Retirement Plan Master Trust
and/or the Employer's Defined Contribution Retirement Plan Trust; and (iii) this
Adoption Agreement.  The terms used in this Adoption  Agreement,  as well as the
rules to be complied with in connection  with the Plan,  are fully  explained in
the Master Plan  Document or the  Employer's  Plan  Document.  When signing this
Adoption Agreement,  if applicable,  the Employer has received copy of the Banco
Popular de Puerto  Rico  Master  Defined  Contribution  Retirement  Plan and the
Master Plan's Summary Plan Description.  The Banco Popular de Puerto Rico Master
Defined  Contribution  Retirement Plan Master Trust is available upon request at
Banco Popular's main offices in Hato Rey, Puerto Rico.

                         1165(e) PLAN ADOPTION AGREEMENT
                   MASTER DEFINED CONTRIBUTION RETIREMENT PLAN
                COPYRIGHT(c) 1998 BY BANCO POPULAR DE PUERTO RICO

                                                                               2

<PAGE>

================================================================================
EMPLOYER INFORMATION
--------------------------------------------------------------------------------

NAME OF EMPLOYER:          GM GROUP, INC.
                    ------------------------------------------------------------
ADDRESS:      PO BOX 364527
         -----------------------------------------------------------------------
              SAN JUAN PR  00936-4527
--------------------------------------------------------------------------------

TELEPHONE:    (787) 751-4343            TELEFAX:      (787) 751-4970
           ----------------------------           ------------------------------

PERSON FOR BANCO POPULAR DE PUERTO RICO TO CONTACT:  EDWIN RIVERA,
                                                     VICEPRESIDENTE RECURSOS
                                                     HUMANOS
                                                    ----------------------------
EMPLOYER TAX IDENTIFICATION NUMBER:        66-0449729
                                    --------------------------------------------
TYPE OF BUSINESS:

        -->  Corporation

Employer's taxable year:

        -->  Fiscal Year ending on     November 30
                                    --------------------------------------------

================================================================================
GENERAL PLAN INFORMATION
--------------------------------------------------------------------------------

PLAN NAME

     GMG RETIREMENT & SAVINGS PLAN (formerly GM Group, Inc. Coda Profit
                                    Sharing Plan)
--------------------------------------------------------------------------------
(Employer's name and type of plan)

ADOPTION OR AMENDMENT OF PLAN
By signing this Adoption Agreement the Employer:

     -->  Adopts the Banco  Popular de Puerto Rico Master  Defined  Contribution
          Retirement Plan and its Master Trust

EFFECTIVE DATE

The effective date of the amendment is:       JANUARY 1st, 2000
                                       -----------------------------------------
                                                       (month/day/year)
(cannot be earlier than the first day of the Plan Year in which the Employer
signs this Adoption Agreement).

The effective date of the original plan was:     JANUARY 1st, 1996
                                            ------------------------------------
                                                      (month/day/year)

PLAN YEAR

The Plan Year will be a calendar year unless the Employer elects otherwise by
checking the box below:

   The Plan Year shall begin on   JANUARY 1     and end on   DECEMBER 31
                                ---------------            ---------------
                                  (month/day)                (month/day)

ACCOUNTING METHOD

The Plan shall use the cash basis accounting method.

                                                                               3
<PAGE>

================================================================================
ELIGIBILITY FOR PLAN PARTICIPATION
--------------------------------------------------------------------------------

WAIVER OF REQUIREMENTS FOR NEW PLANS

Each Employee employed on the Effective Date is automatically eligible to
participate. Employees hired after the Effective Date are eligible upon
satisfying any service and/or age requirements specified below:

AGE REQUIREMENT.  An employee must fulfill the following age requirement to
become a Participant:

   Minimum age      18       (not greater than 21).
               -------------

SERVICE REQUIREMENTS. An employee must fulfill the following service requirement
to become a Participant:

   One year of service.

METHOD FOR CALCULATING YEAR OF SERVICE.

   -->   ELAPSED TIME METHOD. An Employee's service will be determined using the
         elapsed time method, as described in Article 3 of the Master Plan
         document or the Employer's Individual Plan Document.

PREDECESSOR EMPLOYERS. Service with the following predecessor employers will be
treated as service with the Employer:

     AFFILIATES OF POPULAR INC.
--------------------------------------------------------------------------------

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

================================================================================
ENTRY DATES
--------------------------------------------------------------------------------

An Employee may elect to become a Participant and start making Employee
Contributions on any entry date on or after he or she satisfies the Plan's
eligibility requirements.

INDICATE THE PLAN'S ENTRY DATES:

   -->   QUARTERLY ENTRY DATES. The first day of each of the first, fourth,
         seventh and tenth months of the Plan Year is an entry date.

================================================================================
COMPENSATION
--------------------------------------------------------------------------------

For purposes of the Participant's contribution to the Plan, a Participant's
Compensation shall mean the total compensation that is currently includible in
income for income tax purposes paid to him by the Employer during a Plan Year.
Compensation for purposes of the Employer's Profit Sharing and Matching
Contributions, will be basic Compensation, this is, Compensation will EXCLUDE
the following items:

   -->   OVERTIME
   -->   COMMISSIONS
   -->   INCENTIVES
   -->   BONUSES
   -->   OTHER THAN BASE SALARY

                                                                               4

<PAGE>

================================================================================
CONTRIBUTIONS
--------------------------------------------------------------------------------

PROFIT SHARING CONTRIBUTIONS

For each Plan Year in which this Plan is in effect the Employer may make
contributions to the Trust in one or more installments out of its Net Profits
(as defined in section 6.2c.(3) of the Plan) for the Plan Year, in such amounts
as the Employer may determine (if any). The Plan Year for which each
contribution is made shall be designated at the time of the contribution.
Profit-Sharing Contributions may not exceed the lesser of Employer's Net Profits
or 15% of a Participant's Compensation in any Plan Year.

EMPLOYEE CONTRIBUTIONS

Participants may make contributions as follows:

   -->   PRE-TAX CONTRIBUTIONS AND/OR AFTER-TAX CONTRIBUTIONS, AT THE ELECTION
         OF THE PARTICIPANT.

o    Pre-Tax Contributions in a Plan Year may not exceed 10% of Compensation or
     $8,000, in 1998 and thereafter whichever is less.

o    After-Tax Contributions in a Plan Year, if authorized, may not exceed 10%
     of the aggregate compensation paid to the employee during all the years he
     or she has been a Plan Participant.

o    Pre-Tax Contributions and/or After-Tax Contributions may not commence prior
     to the date the Plan is adopted.

MATCHING CONTRIBUTIONS

The Employer will make a Matching Contribution equal to .50 cents for each
dollar of a Participant's:

         -->   PRE-TAX CONTRIBUTIONS.

          However, the Employer will not make Matching Contributions above 6% of
          the Participant's basic Compensation. Matching Contributions will not
          exceed 30% of the Participant's maximum allowable pre-tax
          contribution.

QUALIFIED MATCHING AND NON-ELECTIVE CONTRIBUTIONS

Qualified Matching Contributions and Qualified Non-Elective Contributions, as
defined in the Master Plan Document or the Employer's Plan Document, will be
taken into account for purposes of calculating the Actual Deferral Percentages
of Non-Highly Compensated Employees to the extent necessary to meet the Actual
Deferral Percentage test.

ROLLOVER CONTRIBUTIONS

The Plan's Trustee shall be authorized to receive rollover contributions,

    -->  EVEN IF THE EMPLOYEE HAS NOT MET THE PARTICIPATION REQUIREMENTS OF THE
         PLAN AS OF THE DATE OF THE CONTRIBUTION.

                                                                               5

<PAGE>

================================================================================
VESTING
--------------------------------------------------------------------------------

PRE-TAX AND/OR AFTER-TAX CONTRIBUTIONS

o    Pre-Tax and/or After-Tax Contributions are always 100% vested.

MATCHING CONTRIBUTIONS AND/OR PROFIT SHARING CONTRIBUTIONS

o    Matching  Contributions  and/or Profit Sharing  Contributions  will vest in
accordance with the following vesting schedule:

                                                    Graded Vesting Table
                                              --------------------------------
                                                  (1)               (2)
                                                YEARS OF           VESTED
                                                SERVICE          PERCENTAGE

                                              Less than 1             0
                                              --------------------------------

                                              At least 1             20
                                              --------------------------------
GRADED VESTING.  Participants are vested
in accordance with the following vesting      At least 2             40
schedule:                                     --------------------------------

                                              At least 3             60
                                              --------------------------------

                                              At least 4             80
                                              --------------------------------

                                              At least 5            100
                                              --------------------------------

YEARS OF SERVICE EXCLUDED IN DETERMINING VESTED PERCENTAGES. None.

================================================================================
LOANS
--------------------------------------------------------------------------------

     -->  LOANS TO PARTICIPANTS FROM THE PLAN ARE NOT PERMITTED.

================================================================================
IN-SERVICE WITHDRAWALS
--------------------------------------------------------------------------------

The following provisions will govern the availability of in-service withdrawals
from a Participant's accounts. See Article 9 of the Plan document for additional
details, including definitions and limitations.

     o PROFIT SHARING CONTRIBUTIONS. In-service withdrawals from Profit Sharing
Contributions will not be allowed.

     o PRE-TAX CONTRIBUTIONS. In-service withdrawals from Pre-Tax Contributions
will only be allowed in case of a financial hardship as such term is defined in
Article 9.1 of the Master Plan Document or the Employer's Individual Plan
Document.

     o AFTER-TAX CONTRIBUTIONS. In-service withdrawals from After-Tax
Contributions will be allowed for any reason.

     o MATCHING CONTRIBUTIONS. In-service withdrawals from Matching
Contributions will not be allowed.

     o ROLLOVER CONTRIBUTIONS. Refer to Article 9 of the Master Plan document.

                                                                               6

<PAGE>

FINANCIAL HARDSHIP. An in-service withdrawal will be on account of financial
hardship only if the Participant has an immediate and heavy financial need and
the withdrawal is necessary to meet such need. A withdrawal will be deemed to be
on account of an immediate and heavy financial need if it is occasioned by:

     o    a deductible medical expense incurred by the Participant or his
          spouse, children or dependent; (not reimbursed by medical insurance or
          otherwise);

     o    purchase of the Participant's principal residence (not including
          mortgage payments);

     o    tuition payments for the next semester or quarter of post-secondary
          education for the Participant or his spouse, child or dependent;

     o    rent or mortgage payments to prevent the Participant's eviction from
          or the foreclosure of the mortgage on his principal residence; or

     o    such other event or circumstances as the Puerto Rico Secretary of the
          Treasury through regulations may permit.

A Participant must establish to the Plan Administrator's satisfaction both that
the Participant has an immediate and heavy financial need and that the
withdrawal is necessary to meet the need.

The Trustee and the Plan Administrator shall agree as to the most convenient way
of administering the financial hardship provisions of the Plan.

A Participant who makes a withdrawal on account of a financial hardship may not
make Pre-Tax Contributions or After-Tax Contributions hereunder (or under any
other Plan maintained by the Employer) for a period of 12 months following the
date of the in-service withdrawal.

PAYMENT. Participants' in-service withdrawal request shall be paid on or before
the last day of each:

     -->  MONTH

================================================================================
RETIREMENT AGE
--------------------------------------------------------------------------------

NORMAL RETIREMENT AGE. A Participant will be fully vested and may retire after
the latter of: reaching age 65 or the fifth anniversary of the first day of the
Plan Year in which he/she commenced participation in the Plan.

DISABILITY RETIREMENT. A Participant will be fully vested and may retire before
normal retirement upon becoming disabled.

EARLY RETIREMENT AGE.

     -->  A PARTICIPANT WILL BE FULLY VESTED AND MAY RETIRE PRIOR TO NORMAL
     RETIREMENT AGE UPON REACHING AGE 55 AND COMPLETING 10 YEARS OF SERVICE.

DISTRIBUTION OF VESTED BENEFITS BEFORE RETIREMENT, DEATH OR DISABILITY.

If the Participant terminates his employment with the Employer before reaching
his normal or early retirement age, becoming disable or dying, Participant shall
be allowed to apply for an early distribution of his plan benefits.

                                                                               7

<PAGE>

================================================================================
DISTRIBUTION OF BENEFITS
--------------------------------------------------------------------------------

Upon becoming entitled to the distribution of this Plan's benefits, the
Participants or their authorized representative must request from the Employer
that their benefits be distributed. In such request, the Participant, or his or
her authorized representative, must elect one of the following payment
alternatives:

     -->  LUMP-SUM CASH DISTRIBUTION

================================================================================
TIME OF PAYMENT
--------------------------------------------------------------------------------

When a Participant retires, becomes disabled or dies, the distribution of his
benefits shall commence:

     -->  AS SOON AS IT IS ADMINISTRATIVELY FEASIBLE FOLLOWING THE DATE IN WHICH
     THE PARTICIPANT REQUESTS THE DISTRIBUTION OF HIS OR HER BENEFITS OR SUCH
     AMOUNT BECOMES PAYABLE.

If the Plan Participant terminates his employment for a reason other than death,
disability, or retirement payments shall commence:

     -->  AS SOON AS IT IS ADMINISTRATIVELY FEASIBLE FOLLOWING THE DATE IN WHICH
     THE PLAN PARTICIPANT REQUESTED THE DISTRIBUTION OF HIS OR HER BENEFITS OR
     SUCH AMOUNT BECOMES PAYABLE.

================================================================================
INVESTMENT FUNDS
--------------------------------------------------------------------------------

Investment  Funds  shall be  those  selected  by the  Employer  on the  separate
Investment  Funds  Selection  Form.  All  investment  instructions  as  to  each
Participant's  accounts  will be directed  by the  Participant.  However,  if no
investment  instructions  are  provided by the  Participant,  the  Participant's
accounts will be invested in equal proportions among the investment funds chosen
by the Employer.

       For  purposes of the Plan,  the Trustee shall be considered as a directed
trustee.

================================================================================
PARTICIPANT'S INVESTMENT INSTRUCTIONS
--------------------------------------------------------------------------------

 -->  The  Participants  will be allowed to modify or suspend  their  investment
instructions on a monthly basis,  other changes may be made on a quarterly basis
(1st of January, April, July and October).

================================================================================
PARTICIPANT'S CONTRIBUTIONS TO THE PLAN
--------------------------------------------------------------------------------

      The  Participants  will be allowed to modify  their  pre-tax  and/or their
after-tax contributions to the Plan on a quarterly basis (1st of January, April,
July and October).

                                                                               8

<PAGE>

================================================================================
PLAN ADMINISTRATION
--------------------------------------------------------------------------------

PLAN ADMINISTRATOR. The Employer is the legal Plan Administrator under ERISA.
Specify one or more officers, partners, Employees or other persons to perform
the functions of the Plan Administrator:

      Guillermo L. Martinez, Julio J. Pascual, Edwin Rivera Garcia
--------------------------------------------------------------------------------
      and Angel C. Carballo
--------------------------------------------------------------------------------

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

Each person selected must submit a specimen signature.  Any such appointment may
be changed by written notice.

================================================================================
MASTER TRUST
--------------------------------------------------------------------------------

By executing this Adoption Agreement the Employer adopts the Master Trust
established by Banco Popular de Puerto Rico to carry out the purposes of the
Plan and thus retains Banco Popular as Trustee. The terms of the Trust and
corresponding fees are contained in the Banco Popular de Puerto Rico Master
Defined Contribution Retirement Plan, Master Trust and Fee Schedule
respectively, which are incorporated by reference into this Adoption Agreement.

================================================================================
RECORDKEEPER
--------------------------------------------------------------------------------

By executing this Adoption Agreement, the Employer retains Banco Popular de
Puerto Rico as Record-keeper of the Plan pursuant to the Record-keeping
Agreement and Fee Schedule incorporated by reference into this Adoption
Agreement.

================================================================================
RECORDKEEPER AND TRUSTEE'S FEES
--------------------------------------------------------------------------------

By executing this Adoption Agreement, the Employer agrees to retain Banco
Popular de Puerto Rico as Recordkeeper and, if applicable, as Trustee of the
Plan, for an initial minimum period of three years. This Agreement shall renew
automatically for an indefinite period of time. The Employer may terminate this
Agreement at any time subject to a written termination notice received by Banco
Popular at least thirty days prior to the effective date of termination. If
termination occurs during the initial three year period, the Employer agrees to
compensate Banco Popular with a termination fee equal to three times the total
annual fees minus any amount already satisfied in connection with the services
rendered since the effective date of this agreement. Banco Popular may change
the Fee Schedule from time to time and shall provide written notification to the
Employer.

================================================================================
VALUATING OF PARTICIPANT'S ACCOUNTS
--------------------------------------------------------------------------------

     -->  THE PARTICIPANT'S ACCOUNTS SHALL BE VALUED QUARTERLY.

                                                                               9
<PAGE>

================================================================================
PARTICIPANT'S ACCOUNT STATEMENTS
--------------------------------------------------------------------------------

     -->  THE  PARTICIPANTS  SHALL BE PROVIDED WITH A STATEMENT OF THEIR ACCOUNT
     ON A QUARTERLY BASIS.

================================================================================
EXECUTION OF ADOPTION AGREEMENT
--------------------------------------------------------------------------------

EMPLOYER

Name of Employer:         G M GROUP, INC.
                    ------------------------------------------------------------
Signed:                   /s/ ANGEL C. CARBALLO
        ------------------------------------------------------------------------
Print name and title:     Angel C. Carballo, Senior Vice President
                     -----------------------------------------------------------

--------------------------------------------------------------------------------
Date:    January 11, 2000
     ---------------------------------------------------------------------------

RESPONSIBILITIES OF EMPLOYER

The Employer  understands  that, by establishing this Plan, it will have certain
legal  responsibilities  for which neither the Trustee nor the Plan Sponsor will
be responsible. The Employer also understands that it will be solely responsible
for any  taxes,  costs or  expenses  arising  from the  disqualification  of the
Employer's Plan. The Employer warrants that it has obtained legal and tax advice
to the  extent  the  Employer  deems  necessary  before  signing  this  Adoption
Agreement.

TRUSTEE

Name of Trustee:         BANCO POPULAR DE PUERTO RICO
                  --------------------------------------------------------------
Address:                 209 PONCE DE LEON AVE. SUITE 400 HATO REY PR 00918
                  --------------------------------------------------------------
Signed:                  /s/ MARYVETTE VELAZQUEZ TORRES
                      ----------------------------------------------------------
Print name and title:    MARYVETTE VELAZQUEZ TORRES
                      ----------------------------------------------------------
                         VICE PRESIDENT AND TRUST OFFICER
                      ----------------------------------------------------------
Date:     January 12, 2000
     ---------------------------------------------------------------------------

The identifying number for the Banco Popular de Puerto Rico Master Defined
Contribution Retirement Plan document is 01 and for this Adoption Agreement is
102. The Plan Sponsor is (insert Employer's name and address)

     GM GROUP, INC. PO BOX 364527, SAN JUAN, PR 00936-4527
-------------------------------------------------------------------------------.

Banco Popular de Puerto Rico will notify you if it amends or discontinues this
Master Plan.

The Employer should insure that this Adoption Agreement has been filled out
completely and properly. Failure to do so may result in Plan disqualification.

                                                                             10

<PAGE>

                    EMPLOYER'S SELECTION OF INVESTMENT FUNDS
                    ----------------------------------------

Employer Name:   G M GROUP, INC.
              ------------------------------------------------------------------
Plan Name:       GMG RETIRMENT & SAVINGS PLAN
           ---------------------------------------------------------------------

The Employer selects the following Investment Funds for the above named plan:
(At least three.)

1.               VANGUARD TOTAL BOND MARKET INDEX
                 ---------------------------------------------------------------
2.               FIDELITY ADVISOR INSTITUTIONAL EQUITY GROWTH
                 ---------------------------------------------------------------
3.               VANGUARD WINDSOR II
                 ---------------------------------------------------------------
4.               BANKERS TRUST INVESTMENT INTERNATIONAL EQUITY
                 ---------------------------------------------------------------
5.               DREYFUS EMERGING LEADERS
                 ---------------------------------------------------------------
6.               POPULAR INC, COMMON STOCK
                 ---------------------------------------------------------------

In San Juan, Puerto Rico on the 11 day of January, 2000.

EMPLOYER

         Name of Employer:          G M GROUP, INC.

         Signed:                    /s/ ANGEL C. CARBALLO
                                    --------------------------------------------

         Print name and Title:      Angel C. Carballo, Senior Vice President

         Date:                      January 11, 2000

TRUSTEE

         Name of Trustee:           BANCO POPULAR DE PUERTO RICO

         Signed:                    /s/ MARYVETTE VELAZQUEZ TORRES
                                    --------------------------------------------

         Print name and Title:      MARYVETTE VELAZQUEZ TORRES, VICE PRESIDENT

         Date:                      January 12, 2000

                                                                              11

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