EXHIBIT 10.15

                                 PROMISSORY NOTE


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   Principal      Loan Date        Maturity       Loan No.           Initials
 $750,000.00       4/26/99         11/26/99       101 (extended)
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References  in the  shaded  areas  are for  Lender's  use only and do not  limit
applicability of this document to any particular loan or item.
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Borrower:   ACE Motor Company_                 Lender:  AutoPrime, Inc.
            (formerly known as Suburba                  200 Crescent Court
            Acquisition Company, Inc.                   Suite 1900
            d/b/a ACE Motor Co.)                        Dallas, TX  75201
            5949 Sherry Lane, Suite 525
            Dallas, TX  75225

Principal Amount: $750,000     Initial Rate:  14.250%   Note:   4/26/99

PROMISE  TO PAY.  ACE  Motor  Company  (formerly  known as  Suburba  Acquisition
Company, Inc. d/b/a ACE Motor Co.) ("Borrower") promises to pay AutoPrime,  Inc.
("Lender"),  or order,  in lawful  money of the United  States of  America,  the
principal   amount  of  Seven   Hundred  Fifty   Thousand  and  00/100   Dollars
($750,000.00)  or so much as may be  outstanding  together  with interest on the
unpaid  outstanding  principal  balance as advanced from time to time under this
Note. Interest shall be calculated from the date of each advance until repayment
of each advance or maturity, whichever occurs first.

CHOICE OF USURY  CEILING AND INTEREST  RATE.  The interest rate on this note has
been  implemented  under the "Weekly Rate" as referred to in Section  303.201 of
the Texas  Financial  Code and  Articles  ID.002 and ID.003 of the Texas  Credit
Title.  The terms,  included in the rate, or index,  formula or provision of law
used to compute the rate on the Note,  will be subject to revision as to current
and future balances,  from time to time by notice from Lender in compliance with
Section 303.403 of the Texas Financial Code.

PAYMENT.  Borrower will pay this loan on demand, or if no demand is made, in one
payment  of all  outstanding  principal  plus all  accrued  unpaid  interest  on
November 26, 1999. In addition,  Borrower will pay regular  monthly  payments of
accrued  unpaid  interest  beginning May 1, 1999,  and all  subsequent  interest
payments are due on the same day of each month after that. Interest on this Note
is computed on a 365/365 simple interest  basis;  that is, by applying the ratio
of the annual interest rate over the number of days in a year, multiplied by the
outstanding  principal  balance,  multiplied  by the  actual  number of days the
principal  balance is outstanding.  Borrower will pay Lender at Lender's address
shown above or at such other place as Lender may  designate  in writing.  Unless
otherwise  agreed or required by applicable law,  payments will be applied first
to accrued unpaid interest,  then to principal,  and any remaining amount to any
unpaid collection costs and late charges. Notwithstanding any other provision on
this Note, Lender will not charge interest on any undisbursed loan proceeds.  No
scheduled payment,  whether of principal or interest or both, will be due unless
sufficient  loan funds have been  disbursed  by the  scheduled  payment  date to
justify  the  payment.  VARIABLE  INTEREST  RATE.  The  interest on this Note is
subject to change  from time to time  based on changes in an index  known at the
WALL STREET JOURNAL PRIME RATE (the "Index").  The Index is not  necessarily the
lowest  rate  charged  by  Lender  on its loans and is set by Lender in its sole
discretion.  If the Index  becomes  unavailable  during  the term of this  loan,
Lender may designate a substitute  index after notifying  Borrower.  Lender will
tell  Borrower  the  current  Index  rate  upon  Borrower's  request.   Borrower
understands  that  Lender  may make  loans  based on  other  rates as well.  The
interest  rate  change  will not occur  more  often  that  each  day.  The Index
currently is 7.75% per annum.  The interest rate to be applied prior to maturity
to the unpaid principal balance of this Note will be at a rate of 6.5 percentage
points over the Index, resulting in an initial rate of 14.25% per annum. Notice:
Under no  circumstances  will the  interest  rate on this  Note be more than the

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maximum rate allowed by applicable  law. For purposes of this Note, the "maximum
rate  allowed by  applicable  law"  means the  lesser of (a) the  greater of the
maximum rate of interest  permitted under federal or other law applicable to the
indebtedness  evidenced by this Note, or (b) the "Weekly Rate" as referred to in
Section  303.201 of the Texas Finance Code and Articles ID.002 and ID.003 of the
Texas Credit Title.

REPAYMENT.  Borrower may pay without penalty all or a portion of the amount owed
earlier than it is due. Early  payments will not,  unless agreed to by Lender in
writing,  relieve Borrower or Borrower's obligation to continue to make payments
of accrued unpaid interest. Rather, they will reduce the principal balance due.

POST  MATURITY  RATE.  The Post  Maturity  Rate on this Note is the maximum rate
allowed by  applicable  law.  Borrower  will pay  interest on all sums due after
final maturity,  whether by  acceleration  or otherwise,  at that rate, with the
exception of any amounts  added to the  principal  balance of this Note based on
Lender's payment of insurance  premiums,  which will continue to accrue interest
at the pre-maturity rate.

DEFAULT.  Borrower  will be in  default  if any of the  following  happens:  (a)
Borrower  fails to make any payment when due;  (b)  Borrower  breaks any promise
Borrower has made to Lender, or Borrower fails to comply with or to perform when
due any other term, obligation, covenant, or condition contained in this Note or
any agreement  related to this Note, or in any other  agreement or loan Borrower
has with Lender;  (c)  Borrower  defaults  under any loan,  extension of credit,
security  agreement,  purchase or sales agreement,  or any other  agreement,  in
favor of any  other  creditor  or  person  that  may  materially  affect  any of
Borrower's  property  or  Borrower's  ability  to  repay  this  Note or  perform
Borrower's obligations under this Note or any of the Related Documents;  (d) any
representation  or  statement  made or  furnished  to Lender by  Borrower  or on
Borrower's  behalf is false or misleading in any material  respect either now or
at the time made or furnished;  (e) Borrower  becomes  insolvent,  a receiver is
appointed for any part of Borrower's property,  Borrower makes an assignment for
the benefit of creditors,  or any proceeding is commenced  either by Borrower or
against Borrower under any bankruptcy or insolvency laws; (f) any creditor tries
to take any of Borrower's  property on or in which Lender has a lien or security
interest, including a garnishment of any of Borrower's accounts with Lender; (g)
any of the events  described in this default  section occurs with respect to any
general  partner of  Borrower  or any  guarantor  of this  Note;  (h) a material
adverse change occurs in Borrower's financial condition,  or Lender believes the
prospects of payment or  performance  of the  indebtedness  is impaired;  or (i)
Lender in good faith deems  itself  insecure.  LENDER'S  RIGHTS.  Upon  default,
Lender may  declare  the entire  indebtedness,  including  the unpaid  principal
balance on this Note, all accrued unpaid interest,  and all other amounts, costs
and  expenses  for which  Borrower is  responsible  under this Note or any other
agreement with Lender pertaining to this loan,  immediately due, without notice,
and then  Borrower  will pay that  amount.  Lender may hire an  attorney to help
collect  this Note if Borrower  does not pay,  and  Borrower  will pay  Lender's
reasonable  attorney's fees. Borrower also will pay Lender (i) all other amounts
actually incurred by Lender as court costs,  lawful fees for filing,  recording,
or releasing to any public office any  instrument  securing this loan,  (ii) the
reasonable cost actually expended for repossessing, storing, preparing for sale,
and selling any security and (iii) any fees for noting a lien on or transferring
a certificate  to title to any motor vehicle  offered as security for this loan,
or premiums or  identifiable  charges  received in  connection  with the sale of
authorized  insurance.  This Note has been  delivered  to Lender and accepted by
Lender  in the State of  Texas.  If there is a  lawsuit,  Borrower  agrees  upon
Lender's  request to submit to the  jurisdiction of the courts of Dallas County,
the State of Texas.  This Note shall be governed by and  construed in accordance
with the laws of the State of Texas and applicable Federal laws.

RIGHT OF SETOFF.  Borrower  grants to Lender a contractual  possessory  security
interest in, and hereby assigns,  conveys,  delivers,  pledges, and transfers to
Lender all Borrower's right,  title and interest in and to, Borrower's  accounts
with  Lender  (whether  checking,  savings,  or some other  account),  including
without  limitation all accounts held jointly with someone else and all accounts
Borrower may open in the future, excluding, however, all IRA and Keogh accounts,
and all trust  accounts  for which the  grant of a  security  interest  would be
prohibited  by law.  Borrower  authorizes  Lender,  to the extent  permitted  by
applicable  law, to charge or setoff all sums owing on this Note against any and
all such accounts.

COLLATERAL.  This Note is secured by a blanket lien on vehicle inventory.

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LINE OF CREDIT.  This Note evidences a revolving line of credit.  Advances under
this Note may be requested  orally by Borrower or as provided in this paragraph.
All oral requests  shall be confirmed in writing on the day of the request.  All
communications, instructions, or directions by telephone otherwise to Lender are
to be directed to Lender's  office shown above.  The following  party or parties
are authorized as provided in this paragraph to request  advances under the line
of credit until Lender  receives from  Borrower at Lender's  address shown above
written  notice of revocation of their  authority:  Charles  Norman,  President.
ADVANCE  REQUESTS  CAN BE  OBTAINED  UPON  NOTIFICATION  IN  WRITING  TO LENDER.
Borrower  agrees to be liable for all sums either:  (a)  advanced in  accordance
with  the  instruction  of an  authorized  person  or  (b)  credited  to  any of
Borrower's accounts with Lender. The unpaid principal balance owing on this Note
at any  time  may be  evidenced  by  endorsements  on this  Note or by  Lender's
internal  records  including  daily  computer  print-outs.  Lender  will have no
obligation to advance funds under this Note if: (a) Borrower or any guarantor is
in default  under the terms of this Note or any  agreement  that Borrower or any
guarantor has with Lender,  including any agreement made in connection  with the
signing of this Note; (b) Borrower or any guarantor  ceases doing business or is
insolvent;  (c) any  guarantor  seeks,  claims or  otherwise  attempts to limit,
modify or revoke such guarantor's  guarantee of this Note or any other loan with
Lender;  (d)  Borrower  has  applied  funds  provided  pursuant  to the Note for
purposes  other than  those  authorized  by Lender;  or (e) Lender in good faith
deems itself insecure under this Note or any other agreement  between Lender and
Borrower.  This  revolving line of credit shall not be subject to Section 346 of
the Texas Financial Code.

DISHONORED CHECK CHARGE. In the event a check offered in full or partial payment
on this loan is  returned  unpaid,  Lender may  charge a fee for the  purpose of
defraying the expense  incident to handling such  returned  check,  and Borrower
agrees to pay such fee.  The fee shall not exceed the maximum  amount  permitted
under applicable law.

DOCUMENT REFERENCE.  The REVOLVING CREDIT AGREEMENT FLOOR PLAN OF MOTOR VEHICLES
between  Borrower  and  Lender is hereby  referenced  to and made a part of this
Promissory Note and related documents.

GENERAL  PROVISIONS.  This Note is payable on demand.  The inclusion of specific
default  provisions  or rights of Lender  shall not preclude  Lender's  right to
declare  payment of this Note on its demand.  If any part of this Note cannot be
enforced,  this fact will not affect the rest of the note. In  particular,  this
section  means (among other  things) that  Borrower  does not agree to intend to
pay, and Lender does not agree or intend to contract for charge,  collect, take,
reserve or receive (collectively  referred to herein as "charge or collect", any
amount in the nature of interest or in the nature of a fee for this loan,  which
would in any way or event (including demand,  prepayment, or acceleration) cause
Lender to charge or collect more for this loan than the maximum  Lender would be
permitted  to charge or collect by federal  law or the law of the State of Texas
(as applicable). Any such excessive interest or unauthorized feel shall, instead
of anything  stated to the  contrary,  be applied  first to reduce the principal
balance of this loan, and when that principal has been paid in full, be refunded
to Borrower.  The right to accelerate  maturity of sums due under this Note does
not include the right to accelerate any interest which has not otherwise accrued
on the date of such  acceleration,  and  Lender  does not  intend  to  charge or
collect any  unearned  interest in the event of  acceleration.  All sums paid or
agreed to be paid to Lender for the use,  forbearance  or  detention of sums due
hereunder  shall,  to the extent  permitted  by  applicable  law, be  amortized,
prorated, allocated and spread throughout the full term of the loan evidenced by
this  Note  until  payment  in full so that the rate or amount  of  interest  on
account  of the loan  evidenced  hereby  does not exceed  the  applicable  usury
ceiling.  Lender may delay or forego  enforcing  any of its  rights or  remedies
under this Note without  losing  them.  Borrower and any other person who signs,
guarantees  or  endorses  this  Note,  to  the  extent  allowed  by  law,  waive
presentment,  demand for payment,  protest, notice of dishonor, notice of intent
to  accelerate  the  maturity of this Note,  and notice of  acceleration  of the
maturity  of this Note.  Upon any  change in the terms of this Note,  and unless
otherwise  expressly stated in writing, no party who signs this Note, and unless
otherwise  expressly stated in writing, no party who signs this Note, whether as
make,  guarantor,  accommodation  maker  or  endorser,  shall be  released  from
liability.  All such parties  agree that Lender may renew or extend  (repeatedly
and for any  length  of time)  this  loan,  or  release  any part,  partner,  or
guarantor or  collateral;  or impair,  fail to realize upon or perfect  Lender's
security interest in the collateral  without the consent of or notice to anyone.
All such parties also agree that Lender may modify this loan without the consent
of or notice to anyone other than the party with whom the modification is made.


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RESTATEMENT OF PRIOR NOTE.  This Note amends,  restates,  modifies,  extends and
replaces,  but does not extinguish the indebtedness by, that certain  Promissory
Note,  dated October 26, 1998, in the original  principal amount of $750,000.00,
executed by Borrower, payable to the order of Lender.

PRIOR TO SIGNING THIS NOTE,  BORROWER READ AND  UNDERSTOOD ALL THE PROVISIONS OF
THIS NOTE. BORROWER AGREES TO THE TERMS OF THE NOTE AND ACKNOWLEDGES  RECEIPT OF
A COMPLETED COPY OF THE NOTE.

BORROWER:

ACE Motor Company
(formerly known as Suburba Acquisition Company, Inc. d/b/a ACE Motor Co.)



By:      /s/  Charles Norman
         -------------------
         Charles Norman
         President


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