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                                                                    EXHIBIT 4-G

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                            FORD MOTOR CREDIT COMPANY

                                       AND

                              THE BANK OF NEW YORK,
                                     TRUSTEE

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                          FIFTH SUPPLEMENTAL INDENTURE

                          DATED AS OF FEBRUARY 1, 2000

                            SUPPLEMENTAL TO INDENTURE

                    DATED AS OF JULY 1, 1985, AS SUPPLEMENTED
                    BY THE FIRST SUPPLEMENTAL INDENTURE DATED
                AS OF NOVEMBER 15, 1987, THE SECOND SUPPLEMENTAL
                   INDENTURE DATED AS OF OCTOBER 15, 1988, THE
                    THIRD SUPPLEMENTAL INDENTURE DATED AS OF
                   MARCH 1, 1996, AND THE FOURTH SUPPLEMENTAL
                       INDENTURE DATED AS OF MARCH 1, 1998

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                VARIABLE DENOMINATION FLOATING RATE DEMAND NOTES

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         FIFTH SUPPLEMENTAL INDENTURE, dated as of the first day of February,
2000, between Ford Motor Credit Company, a corporation duly organized and
existing under the laws of the State of Delaware (hereinafter sometimes called
the "Company"), party of the first part, and The Bank of New York, a corporation
duly incorporated and existing under the laws of the State of New York
(hereinafter sometimes called the "Trustee"), as Trustee under the indenture of
the Company (the "Original Indenture"), dated as of July 1, 1985, as
supplemented by a first supplemental indenture (the "First Supplemental
Indenture") dated as of November 15, 1987, a second supplemental indenture dated
as of October 15, 1988 (the "Second Supplemental Indenture"), a third
supplemental indenture (the "Third Supplemental Indenture") dated as of March 1,
1996 and a fourth supplemental indenture (the "Fourth Supplemental Indenture")
dated as of March 1, 1998 (the "Original Indenture, as supplemented by the First
Supplemental Indenture, the Second Supplemental Indenture, the Third
Supplemental Indenture and the Fourth Supplemental Indenture, being hereinafter
called the "Indenture"), party of the second part.

         WHEREAS, the Indenture provides for the issuance from time to time of
the Variable Denomination Floating Rate Demand Notes of the Company (hereinafter
called the "Notes") issuable for the purposes and subject to the limitations
contained in the Indenture;

         WHEREAS, Notes in the aggregate principal amount of $250,000,000 have
been previously authorized for issuance from time to time under the Original
Indenture and additional Notes have been previously authorized for issuance in
the aggregate principal amount of $250,000,000 under the First Supplemental
Indenture, $500,000,000 under the Second Supplemental Indenture, $1,000,000,000
under the Third Supplemental Indenture and $2,000,000,000 under the Fourth
Supplemental Indenture;

         WHEREAS, pursuant to Sections 2.01 and 11.01 of the Indenture, the
Company desires to issue from time to time under the Indenture as supplemented
hereby, in addition to the Notes previously authorized for issuance by the
Company, Notes limited to the aggregate principal amount of Three Billion
Dollars ($3,000,000,000), the further terms and provisions of which are set
forth in the Indenture;

         WHEREAS, the text of the Notes and the Trustee's certificate of
authentication to be borne by the Notes are to be substantially in the forms set
forth in the Indenture; and

         WHEREAS, the Company represents that all acts and things necessary to
make the Notes, when executed by the Company and authenticated and delivered by
the Trustee as in the Indenture and this Fifth Supplemental Indenture provided,
the valid, binding and legal obligations of the Company and to constitute these
presents a valid indenture and agreement according to its terms, have been done
and performed, and the execution of this Fifth Supplemental Indenture and the
issue under the Indenture as further supplemented hereby of the Notes have in
all respects been duly authorized, and

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the Company, in the exercise of legal right and power in it vested, is executing
this Fifth Supplemental Indenture and proposes to make, execute, issue and
deliver the Notes;

         NOW, THEREFORE:

         In order to declare the terms and conditions upon which the Notes are
authenticated, issued and delivered, and in consideration of the premises, of
the purchase and acceptance of the Notes by the holders thereof and of the sum
of one dollar to it duly paid by the Trustee at the execution of these presents,
the receipt whereof is hereby acknowledged, the Company covenants and agrees
with the Trustee, for the equal and proportionate benefit of the respective
holders from time to time of the Notes, as follows:

                                  ARTICLE ONE.

                                   THE NOTES.

         SECTION 1.01 The Notes to be issued from time to time under the
Indenture as supplemented hereby, not including the Notes previously authorized
for issuance by the Company in the Indenture, shall be limited to the aggregate
principal amount of Three Billion Dollars ($3,000,000,000).

                                  ARTICLE TWO.

                            MISCELLANEOUS PROVISIONS.

         SECTION 1.02 This Fifth Supplemental Indenture is executed by the
Company and the Trustee pursuant to the provisions of Section 11.01(f) of the
Indenture, and the terms and conditions hereof shall be deemed to be part of the
Indenture for all purposes. The Indenture, as supplemented by this Fifth
Supplemental Indenture, is in all respects hereby adopted, ratified and
confirmed.

         SECTION 1.03 This Fifth Supplemental Indenture may be executed in any
number of counterparts, each of which shall be an original; but such
counterparts shall together constitute but one and the same instrument.

         SECTION 1.04 The Trustee assumes no responsibility for the correctness
of the recitals herein contained, which shall be taken as the statements of the
Company. The Trustee makes no representations and shall have no responsibility
as to the validity or sufficiency of this Fifth Supplemental Indenture or the
due authorization and execution hereof by the Company.

         SECTION 1.05 This Fifth Supplemental Indenture and each Note shall be
deemed to be a contract made under the laws of the State of New York, and for
all purposes shall be construed in accordance with the laws of such State.

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         IN WITNESS WHEREOF, FORD MOTOR CREDIT COMPANY, the party of the first
part, has caused this Fifth Supplemental Indenture to be duly signed and
acknowledged by its Chairman of the Board or its President or an Executive Vice
President or a Vice President or its Treasurer or its Secretary thereunto duly
authorized, and its corporate seal to be affixed hereunto, and the same to be
attested by its Secretary or an Assistant Secretary; and THE BANK OF NEW YORK,
as Trustee under the Indenture, the party of the second part, has caused this
Fifth Supplemental Indenture to be duly signed and acknowledged by one of its
Vice Presidents or Assistant Vice Presidents thereunto duly authorized, and its
corporate seal to be affixed hereunto, and the same to be attested by one of its
Assistant Treasurers.

                                            FORD MOTOR CREDIT COMPANY

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

Attest:

Assistant Secretary
[CORPORATE SEAL]

                                            THE BANK OF NEW YORK

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

Attest:

Assistant Treasurer
[CORPORATE SEAL]

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STATE OF MICHIGAN       )
                        )  ss.:
COUNTY OF WAYNE         )

         On this_____day of___________, 2000, before me personally came Hurley
D. Smith, to me known, who, being by me duly sworn, did depose and say that he
resides at 8205 Valleyview, Clarkston, Michigan; that he is Secretary of FORD
MOTOR CREDIT COMPANY, one of the corporations described in and which executed
the above instrument; that he knows the corporate seal of said corporation; that
the seal affixed to the said instrument is such corporate seal; that it was so
affixed by authority of the Board of Directors of said corporation, and that he
signed his name thereto by like authority.

         IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal the day and year in this certificate first above written.

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

[NOTARIAL SEAL]

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STATE OF NEW YORK       )
                        )    ss.:
COUNTY OF NEW YORK      )

         On this ______ day of __________, 2000, before me personally came
__________________, to me known, by me duly sworn, did depose and say that
she/he resides at ______________________________________; that she/he is
______________ of THE BANK OF NEW YORK, one of the corporations described in and
which executed the above instrument; that she/he knows the corporate seal of
said corporation; that the seal affixed to the said instrument is such corporate
seal; that it was so affixed by authority of the Board of Directors of said
corporation; and that she/he signed her/his name thereto by like authority.

         IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal the day and year in this certificate first above written.

                                             ___________________________________
                                             Notary Public

[NOTARIAL SEAL]<PAGE>   1

EXHIBIT 10.1

                         CITATION COMPUTER SYSTEMS, INC.
                       NONQUALIFIED STOCK OPTION AGREEMENT

                  This Nonqualified Stock Option Agreement (this "Agreement") is
entered into as of October 15, 1999 (the "Date of Grant") by and between
CITATION Computer Systems, Inc., a Missouri corporation (the "Company"), and J.
Robert Copper (the "Optionee").

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

                  WHEREAS, the Company, in order to induce the Optionee to
continue in the employee of the Company and to contribute to the success of the
Company, desires to grant the Optionee an option to acquire a proprietary
interest in the Company through the purchase of shares of stock of the Company;
and

                  WHEREAS, the Company has determined that it is in the best
interests of the Company and its shareholders to grant the option provided for
herein (the "Option") to the Optionee pursuant to the terms of this Agreement.

                  NOW THEREFORE, in consideration of the mutual covenants
hereinafter set forth, the parties hereto agree as follows:

                  1. Grant of Option. The Company hereby grants to the Optionee
the right and option to purchase, on the terms and conditions hereinafter set
forth, 50,000 shares (the "Option Shares") of common stock, $0.10 par value per
share, of the Company (the "Common Stock"). The purchase price of the Option
Shares shall be $1.625 per share (the "Exercise Price"). This Option is intended
to be treated as a nonqualified stock option. Capitalized terms shall have the
meanings provided in this Agreement.

                  2. Term of Option. The maximum term of the Option shall be
for ten (10) years ending October 15, 2009.

                  3. Vesting of Option. The Option Shares shall vest and become
exercisable three months after the Date of Grant. Notwithstanding the foregoing,
all Option Shares shall become automatically vested upon the occurrence of a
Change of Control (as defined in the individual's Change of Control Agreement
with the Company).

                  4. Exercise of Option.

                     (a)      Upon vesting of Option Shares, the Option shall be
exercisable with respect to such Option Shares from the date of vesting until
the earlier of (i) ninety (90) days after termination of the Optionee's tenure
as an employee of the Company for any reason or (ii) the tenth (10th)
anniversary of the Date of Grant (the "Expiration Date"); provided, however,
that if Optionee dies within one year after termination of the Optionee's tenure
as an employee for any reason, then the period of exercise following death shall
be one year; provided further, however, that in no event shall this Option be
exercised more than ten years after the Date of Grant.

                     (b)      This Option may be exercised by delivering to the
Company at its principal executive office written notice of intent to so
exercise. Such notice shall specify the number of Option Shares for which the
Option is being exercised and shall be accompanied by payment in full of the
Exercise Price and any applicable taxes or like requirements pursuant to Section
8 hereof. Such payment shall be made (i) in cash or by check or, in the
discretion of the Board of Directors, either (ii) by the delivery of shares of
Common Stock of the Company then owned by the Optionee which shares have been
owned for at least six months and have an aggregate fair market value equal to
Exercise Price, or (iii) a request to withhold from the number of shares of
Common Stock otherwise issuable upon exercise of the Option that whole number of
shares of Common Stock having an aggregate fair market value equal to the
Exercise Price, or (iv) by a combination of the foregoing.

                  5. Employment Rights Not Affected. Neither the granting of the
Option or its exercise shall be construed as granting to the Optionee any right
with respect to continuance of employment with the Company. Except as may
otherwise be limited by a written agreement between the Company and the
Optionee, the right of the

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EXHIBIT 10.1

Company to terminate at will the Optionee's employment with the Company at
any time and for any reason whatsoever is specifically reserved by the Company,
and acknowledged by the Optionee.

                  6. Transferability. Except as required by law, this Option is
not transferable, to other than a Permissible Transferee, other than by will or
the laws of descent and distribution or pursuant to a domestic relations order
(as defined under the Internal Revenue Code). A Permissible Transferee is a
person or entity, other than a participant, to whom stock options may be
transferred. Permissible Transferees are limited to the following persons or
entities: (i) one or more members of the participant's family; (ii) one or more
trusts for the benefit of the participant and/or one or more members of the
participant's family; or (iii) one or more partnerships (general or limited),
corporations, limited liability companies or other entities in which the
aggregate interests of the participant and members of the participant's family
exceed 80% of all interests in such entity. For this purpose, the participant's
family includes only the participant's spouse, children and grandchildren.

                     During the Optionee's lifetime, the Option shall be
exercisable only by the Optionee or a Permissible Transferee. In the event of
the Optionee's death, exercise or payment shall be made only by or to a
transferee under a domestic relations order, a Permitted Transferee, the
executor or administrator of the estate of the deceased Optionee or the person
or persons to whom the deceased Optionee's rights under the benefit shall pass
by will or the applicable laws of descent and distribution, and only to the
extent that the deceased Optionee was entitled thereto at the date of death.

                  7. Adjustments Upon Changes in Capitalization, Etc. In the
event the Company shall at any time change the number of issued shares of Common
Stock without new consideration to the Company (such as by stock dividend, stock
split or reorganization), then to the extent the Option hereunder remains
outstanding and unexercised, there shall be a corresponding adjustment as to the
number of shares covered under the Option and in the Exercise Price per share
such that the aggregate consideration payable to the Company and the value of
the Option shall not be changed.

                  8. Withholding.  The Optionee agrees to make appropriate
arrangements with the Company for satisfaction of any applicable Federal, state
or local income tax, withholding requirements or like requirements, including
the payment to the Company at the time of exercise of the Option of all such
taxes and requirements.

                  9. Amendment of Option. The Option may be amended by the Board
of Directors of the Company at any time (i) if the Board determines, in its sole
discretion, that amendment is necessary or advisable in light of any addition to
or change in the Code or in the regulations issued thereunder, or any federal or
state securities law or other laws or regulation, which change occurs after the
Grant Date and by its terms applies to the Option; or (ii) other than in the
circumstances described in clause (I), with the consent of the Optionee. The
foregoing notwithstanding, the Company may, in its sole discretion, cancel the
Option at any time prior to the Optionee's exercise of the Option if, in the
opinion of the Company, the Optionee engages in activities contrary to the
interest of the Company.

                  10. Notice. Any notice to the Company provided for in this
Agreement shall be addressed to it in care of its Secretary at its executive
offices at 424 South Woods Mill Road, Suite 200, Chesterfield, Missouri 63017,
and any notice to the Optionee shall be addressed to the Optionee at the current
address shown on the Payroll Records of the Company. Any notice shall be deemed
to be duly given if and when properly addressed and deposited, postage paid, in
the United States mail or when hand delivered to the party to whom it is
addressed.

                  11. Governing Law.  This Agreement shall be construed in
accordance with and shall be subject to the internal laws of the State of
Missouri, except to the extent preempted by federal law.

              [THE BALANCE OF THIS PAGE INTENTIONALLY LEFT BLANK.]

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EXHIBIT 10.1

                  IN WITNESS WHEREOF, the parties hereto have executed this
Agreement as of the day and year first above written. By execution of this
Agreement, the Optionee acknowledges receipt of a copy of the Plan.

                                       CITATION COMPUTER SYSTEMS, INC.

                                       By:___________________________________

                                       OPTIONEE:

                                       ______________________________________

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