Document:

<PAGE>

                                                                 Exhibit 10.19.1

                          UNIVERSAL ACCESS (UK) LIMITED

Mr Stuart Hinkley
Sandalls Farm
Picadilly Lane
Mayfield
East Sussex
TN20 6RH

Dear Mr Hinkley

UNIVERSAL ACCESS (UK) LIMITED ("THE COMPANY")
---------------------------------------------
RETENTION INCENTIVE PAYMENT
---------------------------

Further to my letter of 11 September 2000 and your acceptance of the Company's
offer of employment, I am writing on behalf of the Company to confirm the terms
upon which the Company is prepared to make the additional payment of $100,000
referred to in your offer letter.

1.   PURPOSE OF PAYMENT

The Company is prepared to make a payment to you of $100,000 by way of a
retention incentive payment ("the Payment").

The Payment reflects the fact that given your position of seniority within the
Company, the benefits which the Company expects to derive from your appointment
depend primarily upon your medium to long-term strategic decisions. The Company
believes that the intimate knowledge of the Company and of its marketplace, and
the subsequent formulation of appropriate strategic policies based on these, are
all attributes which will take some time to develop.

                                      1
<PAGE>

The Payment is, therefore, being made as an incentive for you to remain in your
position for a minimum period of 12 months from your initial date of
appointment. The Company believes that it is once this initial period has been
served that it will begin to obtain the real benefits from your appointment.

2.   TERMS OF PAYMENT

The following terms and conditions apply to the Payment:

1.   A payment of $100,000 (less all necessary deductions for income tax and
     National Insurance in the United Kingdom) will be made on or about 30
     November 2000.

2.   If you either:

     2.1  serve the Company with written notice of your intention to resign; or

     2.2  the Company serves you written notice of its decision to terminate
          your employment for cause

     in either case on or before 1 November 2001 ("the Effective Date"), then
     the Payment will be repayable by you to the Company immediately upon
     written demand to that effect from the Company.

3.   For the purposes of paragraph 2 above:

     3.1  the Effective Date in the event of written notice to terminate being
          served by either you or the Company will be taken to be the date upon
          which any notice is served, and not the date upon which such notice
          shall expire; and

     3.2  "termination for cause" shall mean any termination effected by the
          Company where such dismissal is due to the fact that either:

                                      2
<PAGE>

          3.2.1     the Company, reasonably, believes that its right to
                    terminate your employment has arisen under the provisions of
                    paragraph 19 of your Contract of Employment executed in
                    November 2000; or

          3.2.2     your dismissal is otherwise due to the manner in which you
                    have carried out your duties or obligations under your
                    Contract of Employment, or any failure by you to meet the
                    standards expected of you under your Contract of Employment.

4.   The Company reserves the right to deduct any sums owed by you under the
     provisions of this Agreement from any monies whatsoever owed by the Company
     to you, and by signing this Agreement you specifically authorise such a
     deduction.

5.   You agree that you will repay on demand any sums due to the Company from
     you under the terms of this Agreement. You agree that the sum will be
     recoverable as a debt, together with all costs, including legal costs,
     reasonably incurred by the Company in recovering the sums due.

Please signify your acceptance to the terms and conditions applicable to the
Payment by signing and dating the top copy of this Letter of Agreement and
having your signature witnessed.

Sincerely

UNIVERSAL ACCESS (UK) LIMITED

PATRICK C. SHUTT, DIRECTOR

Signed:
               ----------------------------------

Dated:
               ----------------------------------

Witnessed by:
               ----------------------------------

                                      3<PAGE>

      SUBJECT TO THE TERMS, CONDITIONS AND RESTRICTIONS PRINTED ON THE BACK
                  OF THIS CERTIFICATE AND MADE A PART HEREOF.

               ORGANIZED UNDER THE LAWS OF THE STATE OF WISCONSIN

CERTIFICATE NUMBER _____                                       ___________ UNITS

                            BADGER STATE ETHANOL, LLC
                                  CLASS A UNITS

     THIS CERTIFIES THAT __________________________________________________ IS
THE OWNER AND REGISTERED HOLDER OF _____________________________________ CLASS A
UNITS OF BADGER STATE ETHANOL, LLC, TRANSFERABLE ONLY ON THE BOOKS OF THE
COMPANY BY THE HOLDER HEREOF IN PERSON OR BY DULY AUTHORIZED ATTORNEY UPON
SURRENDER OF THIS CERTIFICATE PROPERLY ENDORSED.

     IN WITNESS WHEREOF, THE COMPANY HAS CAUSED THIS CERTIFICATE TO BE EXECUTED
BY ITS DULY AUTHORIZED OFFICERS THIS _______ DAY OF _____________________, 2001.

----------------------------                         ---------------------------
SECRETARY                                            PRESIDENT

<PAGE>

The transferability of the Company Units represented by this certificate is
restricted. Such Units may not be sold, assigned, or transferred, nor will
any assignee, vendee, transferee, or endorsee thereof be recognized as having
acquired any such Units for any purposes, unless and to the extent such sale,
transfer, hypothecation, or assignment is permitted by, and is completed in
strict accordance with, applicable state and federal law and the terms and
conditions set forth in the second Amended and Restated Operating Agreement and
agreed to by each Member.

The securities represented by this certificate may not be sold, offered for
sale, or transferred in the absence of either an effective registration under
the securities act of 1933, as amended, and under applicable state securities
laws, or an opinion of counsel satisfactory to the company that such
transaction is exempt from registration under the securities act of 1933, as
amended, and under applicable state securities laws.

     FOR VALUE RECEIVED, ______________ HEREBY SELL, ASSIGN AND TRANSFER UNTO
______________________________________________________________________________
______________________________________ UNITS REPRESENTED BY THE WITHIN
CERTIFICATE, AND DO HEREBY IRREVOCABLY CONSTITUTE AND APPOINT
____________________________, ATTORNEY, TO TRANSFER THE SAID UNITS ON THE
BOOKS OF THE WITHIN NAMED COMPANY, WITH FULL POWER OF SUBSTITUTION IN THE
PREMISES.

DATED
     ------------------------       ------------------------------------------
                                    Notice:  The signature to this assignment
IN THE PRESENCE OF                  must correspond with the name as written
                                    upon the face of this Certificate in every
                                    particular, without alteration or
-----------------------------       enlargement or any change whatever.<PAGE>

                                                                   Exhibit 10.16

                                                                  CONFORMED COPY

                                             THIRD AMENDMENT (this "Amendment")
                                    dated as of April 5, 2000 to the Credit
                                    Agreement dated as of January 21, 1998 (as
                                    previously amended, the "Credit Agreement"),
                                    among FISHER SCIENTIFIC INTERNATIONAL INC.
                                    (the "Company"), certain Subsidiaries of the
                                    Company, the lenders from time to time party
                                    thereto, THE CHASE MANHATTAN BANK, as
                                    Administrative Agent, THE CHASE MANHATTAN
                                    BANK OF CANADA, as Canadian Administrative
                                    Agent, CHASE MANHATTAN INTERNATIONAL
                                    LIMITED, as U. K. Administrative Agent,
                                    MERRILL LYNCH CAPITAL CORPORATION, as
                                    Syndication Agent and DLJ CAPITAL FUNDING,
                                    INC. as Documentation Agent.

         A. Capitalized terms used and not otherwise defined herein shall have
the meanings assigned to them in the Credit Agreement.

         B. Pursuant to the Credit Agreement, the Banks have extended credit to
the Borrowers, and have agreed to extend credit to the Borrowers, in each case
pursuant to the terms and subject to the conditions set forth therein.

         C. The Company intends to repurchase shares of its capital stock for an
aggregate purchase price not to exceed $10.0 million.

         D. The Company has requested that the Banks amend the Credit Agreement.

         E. The Required Banks are willing to agree to such amendment and grant
such consent, in each case subject to the terms and conditions set forth herein.

         Accordingly, the parties hereto agree as follows:

         SECTION 1. AMENDMENT. (a) Section 8.07 of the Credit Agreement is
hereby amended by:

<PAGE>

         (i) deleting the text "and;" following the text "$60,000,000" in Clause
(g) thereof;

         (ii) replacing the period after the words "Fisher Technology Group"
with the text "; and" in Clause (h) thereof; and

         (iii) adding the following new clause at the end thereof:

         (i) the Company will be permitted to repurchase shares of its capital
             stock; PROVIDED that such purchases pursuant to this Clause
             (i) shall not exceed $10,000,000 during the term of this Agreement.

         SECTION 2. REPRESENTATIONS AND WARRANTIES. Each of the Borrowers hereby
represents and warrants to each Bank, on and as of the date hereof, that:

         (a) This Amendment has been duly authorized, executed and delivered by
each Borrower, and each of this Amendment and the Credit Agreement as amended by
this Amendment constitutes a legal, valid and binding obligation of each
Borrower, enforceable in accordance with its terms, except to the extent that
the enforceability thereof may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws generally affecting creditors' rights
and by equitable principles (regardless of whether enforcement is sought in
equity or at law).

         (b) The representations and warranties of the Borrowers contained in
the Credit Agreement are true and correct in all material respects on and as of
the date hereof.

         (c) After giving effect to this Amendment, no Default has occurred and
is continuing.

         SECTION 3. EFFECTIVENESS. This Amendment shall become effective on the
date (the "Amendment Effective Date") that each of the following conditions is
met:

<PAGE>

         (a) The Administrative Agent shall have received counterparts hereof
signed by each Borrower and the Required Banks.

         (b) The Administrative Agent shall have received interest, fees and
other amounts due and payable under this Amendment and the Credit Agreement on
or prior to the Amendment Effective Date including, to the extent invoiced, all
reasonable out of pocket costs and expenses of the Administrative Agent
(including, without limitation, the reasonable fees of Cravath, Swaine & Moore,
counsel for the Administrative Agent).

         SECTION 4. EXPENSES. The Company acknowledges that Section 12.01 of the
Credit Agreement applies to this Amendment and hereby agrees to pay all
out-of-pocket expenses reasonably incurred by the Administrative Agent,
including the reasonable fees, charges and disbursements of Cravath, Swaine &
Moore, counsel for the Administrative Agent, in connection with the preparation,
execution and delivery of this Amendment.

         SECTION 5. MISCELLANEOUS. (a) This Amendment constitutes the entire
agreement and understanding of the parties with respect to the subject matter
hereof and supersedes any and all prior agreements and understandings, oral or
written, relating to the subject matter hereof.

         (b) Section headings used herein are for convenience of reference only
and are not to affect the construction of, or to be taken into consideration in
interpreting, this Amendment.

         (c) THIS AMENDMENT SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED
BY THE LAW OF THE STATE OF NEW YORK.

         (d) Each reference to a party hereto shall be deemed to include its
successors and assigns, all of whom shall be bound by this Amendment and to
whose benefit the provisions of this Amendment shall inure.

         (e) This Amendment may be executed in any number of counterparts, each
of which shall be an original but all

<PAGE>

of which, when taken together, shall constitute but one instrument.

         (f) Except as specifically amended or modified hereby, the Credit
Agreement shall continue in full force and effect in accordance with the
provisions thereof.

<PAGE>

                                       5

            IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed by their respective authorized officers as of the date first
above written.

                                    FISHER SCIENTIFIC
                                    INTERNATIONAL INC.,

                                    By: /s/  Todd M. Duchene
                                        ----------------------------------
                                        Name: Todd M. Duchene
                                        Title: Vice President,
                                               General Counsel,
                                               Secretary

                                    FISHER SCIENTIFIC U.K.,
                                    LIMITED,

                                    By: /s/  Richard A. Luhianuk
                                        ----------------------------------
                                        Name: Richard A. Luhianuk
                                        Title: Attorney-in-Fact

                                    FISHER SCIENTIFIC LIMITED,

                                    By: /s/  Todd M. Duchene
                                        ----------------------------------
                                        Name: Todd M. Duchene
                                        Title: Vice President,
                                               General Counsel,
                                               Secretary

                                    ACROS ORGANICS N.V.,

                                    By: /s/  Richard A. Luhianuk
                                        ----------------------------------
                                        Name: Richard A. Luhianuk
                                        Title: Attorney-in-Fact

                                    FISHER SCIENTIFIC S.A.,

                                    By: /s/  Denis M. Maiorani
                                        ----------------------------------
                                        Name: Denis M. Maiorani
                                        Title: Administrator

<PAGE>

                                    FISHER SCIENTIFIC GmbH,

                                    By: /s/  Richard A. Luhianuk
                                        ----------------------------------
                                        Name: Richard A. Luhianuk
                                        Title: Attorney-in-Fact

                                    FISHER SCIENTIFIC KOREA LTD.,

                                    By: /s/  Richard A. Luhianuk
                                        ----------------------------------
                                        Name: Richard A. Luhianuk
                                        Title: Attorney-in-Fact

                                    FISHER SCIENTIFIC B.V.,

                                    By: /s/  Richard A. Luhianuk
                                        ----------------------------------
                                        Name: Richard A. Luhianuk
                                        Title: Attorney-in-Fact

                                    CASA ROCAS S.A. DE C.V.,

                                    By: /s/  Richard A. Luhianuk
                                        ----------------------------------
                                        Name: Richard A. Luhianuk
                                        Title: Attorney-in-Fact

                                    FISHER GENETICS ASIA  Pte Ltd.,

                                    By: /s/  Richard A. Luhianuk
                                        ----------------------------------
                                        Name: Richard A. Luhianuk
                                        Title: Attorney-in-Fact

                                    FISHER SCIENTIFIC Pte Ltd.,

                                    By: /s/  Richard A. Luhianuk
                                        ----------------------------------
                                        Name: Richard A. Luhianuk
                                        Title: Attorney-in-Fact

                                    WINIGER AG,

                                    By: /s/  Denis N. Maiorani
                                        ----------------------------------
                                        Name: Denis N. Maiorani
                                        Title: Administrator

<PAGE>

                                    THE CHASE MANHATTAN BANK, as
                                    Administrative Agent and as a
                                    Bank,

                                    By: /s/  Stacey Haimes
                                        ----------------------------------
                                        Name:  Stacey Haimes
                                        Title: Vice President

                                    MERRILL LYNCH CAPITAL
                                    CORPORATION, as Syndication
                                    Agent and as a Bank,

                                    By: /s/  Carol J.E. Feeley
                                        ----------------------------------
                                        Name:  Carol J.E. Feeley
                                        Title: Vice President

                                    DLJ CAPITAL FUNDING, INC., as
                                    Documentation Agent and as a
                                    Bank,

                                    By: /s/ Dana F. Klein
                                        ----------------------------------
                                        Name:  Dana F. Klein
                                        Title: Senior Vice President

<PAGE>

                                    ABN AMRO BANK N.V.,

                                    By: /s/ James S. Aldensharm
                                        ----------------------------------
                                        Name:  James S. Aldensharm
                                        Title: Group Vice President

                                    By: /s/ Richard Shrage
                                        ----------------------------------
                                        Name:  Richard Shrage
                                        Title: Vice President

                                    ALLIANCE INVESTMENTS LIMITED,

                                    By: /s/ James E. Kennedy, Jr.
                                        ----------------------------------
                                        Name:  James E. Kennedy, Jr.
                                        Title: Authorized Signatory

                                    ARCHIMEDES FUNDING II, LTD.,

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

                                    AVALON CAPITAL LTD.,

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

                                    BANKBOSTON, N.A.,

                                    By: /s/ Stephen M. Curran
                                        ----------------------------------
                                        Name:  Stephen M. Curran
                                        Title: Vice President

                                    BANK OF AMERICA, N.A.,

                                    By: /s/ John W. Pocalyko
                                        ----------------------------------
                                        Name:  John W. Pocalyko
                                        Title: Managing Director

<PAGE>

                                    THE BANK OF NOVA SCOTIA,

                                    By: /s/ T. M. Pitcher
                                        ----------------------------------
                                        Name:  T. M. Pitcher
                                        Title: Authorized Signatory

                                    BANK OF TOKYO-MITSUBISHI TRUST
                                    CO.,

                                    By: /s/ Paul Malecki
                                        ----------------------------------
                                        Name:  Paul Malecki
                                        Title: Vice President

                                    BANK ONE, N.A.
                                       (Main Office: Chicago),

                                    By: /s/ Robert McMillan
                                        ----------------------------------
                                        Name:  Robert McMillan
                                        Title: Assistant Vice President

                                    BANQUE NATIONALE DE PARIS,
                                    as Co-Agent,

                                    By: /s/ Stephanie Rogers
                                        ----------------------------------
                                        Name:  Stephanie Rogers
                                        Title: Vice President

                                    By: /s/ Himanshu Mehta
                                        ----------------------------------
                                        Name:  Himanshu Mehta
                                        Title: Senior Vice President

                                    BHF (USA) CAPITAL CORPORATION,

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

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

<PAGE>

                                    BALANCED HIGH YIELD FUND II LTD,

                                    By: BHF-Bank
                                        Aktiengesellschaft, acting
                                        through its New York
                                        Branch, as attorney-in-
                                        fact,

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

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

                                    CAPTIVA III FINANCE, LTD.,

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

                                    CHASE SECURITIES INC., as Agent
                                    for THE CHASE MANHATTAN BANK,

                                    By: /s/ Stacey Haimes
                                        ----------------------------------
                                        Name:  Stacey Haimes
                                        Title: Vice President

                                    CIBC INC.,
                                    CIBC WORLD MARKETS. CORP.,
                                    as Agent,

                                    By: /s/ Ihor Zaluckyj
                                        ----------------------------------
                                        Name:  Ihor Zaluckyj
                                        Title: Executive Director

                                    CITY NATIONAL BANK,

                                    By: /s/ George Hayrapetian
                                        ----------------------------------
                                        Name:  George Hayrapetian
                                        Title: Vice President

<PAGE>

                                    CONTINENTAL ASSURANCE COMPANY,

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

                                    CREDIT INDUSTRIEL ET COMMERCIAL,

                                    By: /s/ Anthony Rock
                                        ----------------------------------
                                        Name:  Anthony Rock
                                        Title: Vice President

                                    By: /s/ Marcus Edwards
                                        ----------------------------------
                                        Name:  Marcus Edwards
                                        Title: Vice President

                                    THE DAI-ICHI KANGYO BANK,
                                        LIMITED,

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

                                    DLJ CAPITAL FUNDING, INC.,

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

                                    ELC (CAYMAN) LTD.,

                                    By: /s/ John W. Stelwagon III
                                        ----------------------------------
                                        Name:  John W. Stelwagon III
                                        Title: Director

<PAGE>

                                    EATON VANCE SENIOR INCOME TRUST,

                                    By:    Eaton Vance Management
                                           as Investment Advisor,

                                    By: /s/ Scott H. Page
                                        ----------------------------------
                                        Name:  Scott H. Page
                                        Title: Vice President

                                    EATON VANCE INSTITUTIONAL SENIOR
                                    LOAN,

                                    By:    Eaton Vance Management as
                                           Investment Advisor,

                                    By: /s/ Scott H. Page
                                        ----------------------------------
                                        Name:  Scott H. Page
                                        Title: Vice President

                                    ERSTE BANK DER OESTERREICHISCHEN
                                    SPARKASSEN AG,

                                    By: /s/ Arcinee Hovanessian
                                        ----------------------------------
                                        Name:  Arcinee Hovanessian
                                        Title: Vice President

                                    By: /s/ John S. Runnion
                                        ----------------------------------
                                        Name:  John S. Runnion
                                        Title: First Vice President

                                    FIRSTRUST BANK,

                                    By: /s/ Bryan T. Denney
                                        ----------------------------------
                                        Name: Bryan T. Denney
                                        Title: Vice President

                                    FLEET NATIONAL BANK,

                                    By: /s/ Stephen M. Curran
                                        ----------------------------------
                                        Name:  Stephen M. Curran
                                        Title: Vice President

<PAGE>

                                    FRANKLIN FLOATING RATE TRUST,

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

                                    GALAXY CLO 1999-1, LTD.,

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

                                    GENERAL ELECTRIC CAPITAL CORP.,

                                    By: /s/ Gregory L. Hong
                                        ----------------------------------
                                        Name:  Gregory L. Hong
                                        Title: Duly Authorized Signatory

                                    HSBC BANK USA,

                                    By: /s/ John B. Lyons
                                        ----------------------------------
                                        Name:  John B. Lyons
                                        Title: Senior Vice President

                                    INDOSUEZ CAPITAL FUNDING IV, L.P.,

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

                                    THE INDUSTRIAL BANK OF JAPAN
                                    LIMITED,

                                    By: /s/ Takuya Honjo
                                        ----------------------------------
                                        Name:  Takuya Honjo
                                        Title: Deputy General Manager

<PAGE>

                                    PPM AMERICA,INC., as attorney in
                                    fact, on behalf of
                                    JACKSON NATIONAL LIFE INSURANCE
                                    CO.,

                                    By: /s/ Michael Dire
                                        ----------------------------------
                                        Name: Michael DiRe
                                        Title: Managing Director

                                    KZH CNC LLC,

                                    By: /s/ Susan Lee
                                        ----------------------------------
                                        Name:  Susan Lee
                                        Title: Authorized Agent

                                    KZH CRESCENT-2 LLC,

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

                                    KZH CYPRESSTREE-1 LLC,

                                    By: /s/ Susan Lee
                                        ----------------------------------
                                        Name:  Susan Lee
                                        Title: Authorized Agent

<PAGE>

                                    KZH III LLC,

                                    By: /s/ Susan Lee
                                        ----------------------------------
                                        Name:  Susan Lee
                                        Title: Authorized Agent

                                    KZH LANGDALE LLC,

                                    By: /s/ Susan Lee
                                        ----------------------------------
                                        Name:  Susan Lee
                                        Title: Authorized Agent

                                    KZH SOLEIL LLC,

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

                                    MELLON BANK, N.A.,

                                    By: /s/ R. Jane Westrich
                                        ----------------------------------
                                        Name:  R. Jane Westrich
                                        Title: Vice President

                                    MERRILL LYNCH CAPITAL CORPORATION,

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

                                    MITSUBISHI TRUST & BANKING CORP.,

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

<PAGE>

                                    ML CLO XV PILGRIM AMERICA (CAYMAN)
                                    LTD.,

                                    By: Pilgrim Investments, Inc.
                                        as its Investment Manager,

                                    By: /s/ Mark F. Haak
                                        ----------------------------------
                                        Name:  Mark F. Haak
                                        Title: Assistant Vice President

                                    NATEXIS BANQUE BFCE,

                                    By: /s/ Frank H. Madden, Jr.
                                        ----------------------------------
                                        Name:  Frank H. Madden, Jr.
                                        Title: Vice President and Group
                                               Manager

                                    By: /s/ John Stewart
                                        ----------------------------------
                                        Name:  John Stewart
                                        Title: Associate

                                    NEW YORK LIFE INSURANCE COMPANY,

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

                                    NEW YORK LIFE INSURANCE AND ANNUITY
                                    CORPORATION,

                                    By:    New York Life Insurance
                                           Company,

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

<PAGE>

                                    NORTH AMERICAN SENIOR FLOATING RATE
                                    FUND,

                                    By:    CYPRESSTREE INVESTMENT
                                           MANAGEMENT COMPANY, INC., as
                                           Portfolio Manger,

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

                                    PILGRIM AMERICA HIGH INCOME
                                    INVESTMENTS LTD.,

                                    By:    PILGRIM INVESTMENTS INC., as
                                           its Investment Manager,

                                    By: /s/ Mark F. Haak
                                        ----------------------------------
                                        Name:  Mark F. Haak
                                        Title: Assistant Vice President

                                    SENIOR DEBT PORTFOLIO,

                                    By:    BOSTON MANAGEMENT AND
                                           RESEARCH, as Investment
                                           Advisor,

                                    By: /s/ Scott H. Page
                                        ----------------------------------
                                        Name:  Scott H. Page
                                        Title: Vice President

                                    THE SUMITOMO BANK, LIMITED
                                    NEW YORK BRANCH,

                                    By: /s/  Greg Aptman
                                        ----------------------------------
                                        Name: Greg Aptman
                                        Title: Authorized Signatory

                                    THE TRAVELERS INSURANCE COMPANY,

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

<PAGE>

                                    VAN KAMPEN CLO I, LIMITED,

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

                                    VAN KAMPEN PRIME RATE INCOME TRUST,

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

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