Document:

EXTENSION AGREEMENT: GIANT TIRE RECYCLERS, INC.

                               EXTENSION AGREEMENT

         THIS  EXTENSION  AGREEMENT is made and executed this 16th day of
April, 1999, to be effective  as of 28th day of April,  1999 by and between
GARB OIL & POWER  CORPORATION,  a Utah  corporation  ("Garb-Oil") and GIANT
TIRE RECYCLERS, INC., a Nevada Corporation ("GTR").

                                R E C I T A L S

         A. Garb-Oil,  as the "Seller" and GTR, as the "Buyer" are parties to
an agreement dated April 28, 1997 entitled "Option Contract" referred to
herein as the "Option Contract".

         B. The Option Contract  gives  GTR the right to  purchase  "Exclusive
Rights" to use Patented Garb-Oil  technology to recycle and process Off The
Road (OTR) tires. (See Option Contract Exhibit "B")

         C.  The  Option  Contract  requires  the OTR  Project  Agreement  to
be executed no later than April 28, 1999.

         D.  Garb-Oil is willing to grant GTR an  extension  of the due date
for the April 28, 1999 Contract  Execution  date,  and Art is willing to
obtain such extension, on the terms and conditions set forth herein.

NOW  THEREFORE,  in  consideration  of the  premises,  the mutual  covenants
and  conditions  set forth  herein and other  good and  valuable
consideration,  the receipt and sufficiency of which is hereby acknowledged,
the parties agree to be legally bound as follows:

         1. Paragraph 1. Of the original OPTION CONTRACT,  dated April 28,
1997, is amended to read as follows.

         Grant of Option.  Garb-Oil  acknowledges  receipt  from  Optionee of
an initial  non-refundable  Option  payment  in the  amount of One  Hundred
Fifty Thousand ($150,000.00) Dollars which will be  applied to the total
purchase price of the OTR Project Agreement.  Garb-Oil hereby grants to
Optionee, and Optionee hereby  accepts from Garb-Oil,  the right and option
("Option") to purchase the Exclusive  License  during the Option Period (as
hereinafter  defined),  at the
Purchase  Price (as  hereinafter  defined) and in accordance  with the terms
and conditions of the "Amended" OTR PROJECT AGREEMENT. The OTR PROJECT
AGREEMENT (AS AMENDED) is set forth in its general  terms and  attached as
Exhibit A. Some of the non-material or  non-substantial  terms of the OTR
PROJECT  AGREEMENT may be revised or added,  as negotiated and mutually agreed
upon by the parties through good-faith  negotiations,  as more fully described
below,  after Optionee gives
notice  of intent to  exercise  Option  (the OTR  PROJECT  AGREEMENT,  as may
be revised, is hereinafter referred to as the "Final Agreement").

         2. Paragraph 2. Of the original Option  Contract,  dated April 28,
1997 is amended to read as follows.

Option  Period.  The  Option  Period  shall  commence  as of April 29,  1999
and continue for a period of one (1) year (the "Option Period").

         3. Paragraph 4 of the original  Option Contract Dated April 28, 1997
is amended to read as follows

Purchase  Price.  The  Purchase  price for the  Exclusive  License  shall be
One Million  Three  Hundred  Fifteen  Thousand  ($1,315,000.00) Dollars
("Purchase Price") and shall be payable as outlined in the OTR PROJECT
AGREEMENT, paragraph 4, attached hereto as "EXHIBIT A".

         4. In the event that the  contract is not  executed and the payment
due under  paragraph  4 of the  Agreement  is not  paid  when  due (as
extended  by paragraph 2 of this Extension  Agreement),  then Garb may notify
GTR that GTR is in  default  under the  Option  Contract and GTR shall have
(14) days after the dispatch of such notice to cure such defaults by executing
the OTR Agreement and making the required payment. If GTR does not so cure the
defaults, Garb shall be entitled  without  further  notice to GTR to (i)
declare  the  Option  Contract
terminated,  thereby  relieving  Garb from further obligations thereunder and
terminating any rights of GTR thereunder, and (ii) to retain as its own
property without any interest or claim of GTR, all payments theretofore made
by GTR.

         5. The notice permitted to be given by the preceding paragraph shall
be sent by facsimile to GTR at (520)  623-3360 with a hard copy sent by first
class mail to 2419 N.  Geronimo  Ave.  Apt. B,  Tucson,  AZ 85705.  All other
notices required  or  permitted  to be given shall be in  accordance  with the
terms and conditions of the OTR Agreement.

         6. The  parties  intend  this  Extension  Agreement  to  amend  the
OTR Agreement as set forth above and as shown in the Amended OTR PROJECT
AGREEMENT. The Amended OPTION CONTRACT and as expressly  amended hereby, the
OTR Agreement and OPTION CONTRACT shall remain in full force and effect.

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to
be executed  by their duly  authorized  officers  on the date and year first
above written.

                           Garb-Oil: GARB-OIL & POWER CORPORATION

                                        By /s/ John C. Brewer
                                        ---------------------------
                                        Its President

                           GTR:         GIANT TIRE RECYCLERS, INC.

                                        By /s/ Herbert Kuglmeier
                                        ---------------------------
                                        Its PresidentAGREEMENT:GARBALIZER MACHINERY CORP AND COMPANY

                                   AGREEMENT

         This agreement entered into the date below shown between Garbalizer
Machinery Corporation, a Utah corporation [Garbalizer] and Garb-Oil & Power
Corporation, a Utah corporation [Garb-Oil]

         Whereas Garbalizer, on February 25, 1999 entered into a stock
exchange agreement with RecycleNet Corporation of Ontario, Canada
[RecycleNet], and

         Whereas Garbalizer and RecycleNet agreed that Garbalizer would have,
prior to the closing of said agreement, the right to sell and convey all its
existing assets  (including the "Garbalizer" name and logo, patents, machinery
designs, and contract rights) to Garb-Oil in exchange for Garb-Oil's
assumption of existing indebtedness of Garbalizer in the approximate amount of
$500,000.00
(U.S.), and

         Whereas Garb-Oil is desirous of obtaining said existing  assets, the
"Garbalizer" name and logo, patents, machinery designs, and contract rights
and further, is desirous of assuming the existing  indebtedness of Garbalizer
in the approximate amount of $500,000.00 (U.S.), and

         Whereas the board of directors of both  Garbalizer and Garb-Oil have
by resolution authorized their respective corporation to enter  into this
transaction and have authorized the officers of their respective corporations
to perform all acts necessary and to execute all documents necessary to effect
this transaction, therefore

         Garbalizer, by these presents, hereby convoys all existing assets
including all right, title, and interest in and to the Garbalizer name and
logo, patents [as identified in the attached exhibit], machinery designs, and
contract rights by it possessed.

         Garb-Oil, by these presents, and as consideration for the assets
above referenced, hereby assumes all existing indebtedness of  Garbalizer in
the approximate amount of $500,000.00 (U.S.).

         Dated the 19th day of March, 1999.

GARBALIZER MACHINERY CORPORATION                  ATTEST

By /s/ John C. Brewer                             /s/ Charles K. Laver
---------------------                             --------------------
        President                                 secretary

GARB-OIL & POWER CORPORATION                      ATTEST:

By /s/ John C. Brewer                             /s/ Charles K. Laver
---------------------                             --------------------
        President                                 secretary

<PAGE>

                                   EXHIBIT TO
                               GARALIZER/GARB-OIL
                                    AGREEMENT

                           GARBALIZER SHREDDER PATENTS

U.S. PATENTS

                                                  patent #3578252
                                                  patent #3708127
                                                  patent #3762655
                                                  patent #3840187
                                                  patent #3893635
                                                  patent #3951346
                                                  patent #4059236
                                                  patent #4082232
                                                  patent #4099678
                                                  patent #4125228
                                                  patent #4176800
                                                  patent #4205799
                                                  patent #4350308
                                                  patent #4927088

INTERNATIONAL PATENTS

     Canada                                       patent #1018958
     Canada                                       patent #1137949
     Switzerland                                  patent #555195
     Japan                                        patent #924581
     England                                      patent #1441783
     France                                       patent #74-02442

Garbalizer  Machinery  Corporation has the following  machinery patents which
it intends to develop and market as funds become available

     Mechanical Wast Receiver                     patent #3660038
     Waste Remover Vehicle [packer truck]         patent #3831789
     Air Classification                           patent #3856217
     Refuse Processing Equipment [mangler]        patent #3966129
     Waste Mangler System and Structure           patent #3993256IWERKS ENTERTAINMENT, INC.

                              CONSULTING AGREEMENT

     This Consulting Agreement (the "Agreement") is made and entered into
effective as of February 15, 2000, by and between IWERKS ENTERTAINMENT, INC., a
Delaware corporation (the "Company"), and DONALD W. IWERKS ("Consultant").

     THE PARTIES AGREE AS FOLLOWS:

1.   BONUS. The Company shall pay to consultant a one-time cash bonus of One
Hundred Thousand Dollars ($100,000) if either (or both) of the following occurs:
(i) a Change in Control, or (ii) the Company engages in an equity financing
transaction (or series of related transactions) whereby the Company issues
Company common stock, preferred stock or other equity securities, or options,
warrants or other rights to acquire the same and receives gross proceeds from
the financing of not less than Three Million Dollars ($3,000,000). Any payment
owing under this Section shall be made by the Company within 10 business days
after the occurrence of the triggering event specified in clause (i) or (ii), as
applicable. In the event that a transaction does not occur before July 31, 2000
that triggers the payment of a bonus pursuant to this paragraph, it is
understood that this agreement will be re-negotiated or, at the option of
Consultant, retained in effect.

2.   INDEPENDENT CONTRACTOR. Consultant enters into this Agreement as, and shall
continue to be, an independent contractor. Consultant shall pay all federal,
state and other income taxes due and properly file appropriate tax returns.
Consultant shall not be entitled to any Company employee benefits. All payments
owning to Consultant under this Agreement shall be paid by the Company without
withholding, deduction or offset of any kind.

3.   GENERAL PROVISIONS. This Agreement shall be governed by and construed in
accordance with the laws of the State of California applicable to contracts
entered into in California between California residents. If any provision of
this Agreement is for any reason found by a court of competent jurisdiction to
be unenforceable, the remainder of this Agreement shall continue in full force
and effect. This Agreement embodies the entire agreement between the parties and
supersedes all prior agreements and understandings between the parties with
respect to its subject matter. This Agreement may not be changed unless mutually
agreed upon in writing by both parties.

     IN WITNESS WHEREOF, the parties have executed this Consulting Agreement
as of the date first set forth above.

     COMPANY:            IWERKS Entertainment, INC., a Delaware corporation

                         By:       /s/ Peter G. Hanelt
                               --------------------------------------------
                         Title:   Director, Chairman of the Compensation
                                  Committee

     CONSULTANT:         /s/ Donald W. Iwerks
                         --------------------------------------------------
                         Donald W. Iwerks

<PAGE>

                              IWERKS ENTERTAINMENT

August 21, 2000

Don Iwerks
Chairman
Iwerks Entertainment, Inc.
4540 W. Valerio Street
Burbank, CA  91505

RE:  February 15, 2000 Consulting Agreement

Dear Don:

Given the continuing needs of the Company and the unexpected delays in
consummating a merger transaction, Iwerks has elected to extend the Consulting
Agreement between yourself and Iwerks Entertainment through December 31, 2000.

The July 31, 2000 triggering date will be changed to December 31, 2000. All the
remaining terms and conditions of the original agreement remain the same.

Best regards,

/S/ GARY MATUS                                   /S/ JEFF DAHL
---------------------                            ------------------------
Gary Matus                                       Jeff Dahl
Director                                         SVP/CFO

Consultant:    /S/ DON IWERKS
               -------------------
               Don Iwerks

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