Document:

<PAGE>   1
                                                                   EXHIBIT 10.14

               ADDENDUM TO NOVEMBER 21, 1999 EMPLOYMENT AGREEMENT

     THIS ADDENDUM dated as of January 1, 1999, is to that certain EMPLOYMENT
AGREEMENT (the "Agreement") dated as of November 21, 1998 by and among
Snowboard Corsaire, Inc. ("Corsaire"), and William R. Dunavant ("Dunavant")

                                    RECITALS

     WHEREAS, the parties have determined that the Agreement needs to be
modified in certain respects; and

     WHEREAS, the parties are simultaneously excuting the Agreement and this
Addendum.

     NOW THEREFORE, THE PARTIES AGREE AS FOLLOWS:

     The following numbered paragraph in the Agreement shall be replaced in its
entirety by the following paragraph. All other paragraphs in the Agreement
shall remain in full force and effect and are incorporated herein by reference.

     5.   STOCK COMPENSATION. In addition to a salary to be determined by the
new Board of Directors, Corsaire agrees to issue to Dunavant TWO MILLION
(2,000,000) shares of Corsaire common stock upon execution of this Addendum.
Said shares are subject to the Company's absolute right of cancellation if
Dunavant has not become president of Corsaire on or before March 31, 1999.

AGREED AND ACCEPTED on this 1st day January, 1999.

                                    Snowboard Corsaire, Inc.

/s/ William R. Dunavant             By: /s/ Rene Hamouth
------------------------               ----------------------------------------
    William R. Dunavant                Rene Hamouth, President and Sole Director<PAGE>   1
                                                                   EXHIBIT 10.15

                                    ADDENDUM

THIS ADDENDUM ("Addendum") entered into this 1st day of March, 1999, by and
between Net Command Tech, Inc., a Delaware corporation ("Company") with offices
at 62 Indian Trace, Weston, Florida 33326 and William R. Dunavant
("Executive"), with an address of 2461 Provence Circle, Weston, Florida 33327.

                             W I T N E S S E T H :

WHEREAS, the Company and the Executive have entered into an Employment
Agreement ("Agreement") on this same date; and

WHEREAS, the Company and Executive have agreed that this Addendum shall form a
part of the Agreement;

NOW, THEREFORE, in consideration of the mutual promises contained herein and in
the Agreement and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows:

1.   PRECEDENCE AND INCORPORATION. This Addendum forms a part of the Agreement
attached. The Agreement and this Addendum shall be considered one document. The
terms contained in this Addendum shall take precedence over any Agreement terms
that are inconsistent with this Addendum. Terms used in this Addendum shall
have the same meaning as ascribed to them in the Agreement.

2.   INTERIM BASE SALARY REVIEW. Executive's Base Salary shall be reviewed for
an interim increase on January 1, 2000.

3.   SEPARATION PAY. Executive shall be entitled to receive twelve (12) month's
pay as separation pay in the event of Executive's termination of employment
with the Company, so long as Executive is not terminated with cause, as that
term is defined in Paragraph 6 of the Agreement. Executive shall also receive
any bonus earned (pro-rata) at the time of termination, so long as Executive is
not terminated without cause, as that term is defined in Paragraph 6 of the
Agreement. Payment shall be made, in the Company's sole discretion, in a lump
sum or periodic payments over six months. Executive's life, medical, and other
insurance coverages shall be maintained at the Company's expense for a period
of twelve (12) months or until such time that Executive obtains new full time
employment, so long as Executive is not terminated without cause, as that term
is defined in Paragraph 6 of the Agreement. Additionally, the Company vehicle
provided to Executive under Paragraph 6E shall be purchased by the Company and
given/titled to Dunavant, so long as Executive is not terminated with cause,
as that term is defined in Paragraph 6 of the Agreement.

The Company has no severance pay policy or plan and this separation pay shall
not be considered severance pay. However, this paragraph 3 shall survive
termination of the Agreement, provided that it is not terminated under
Paragraph 6 of the Agreement.
<PAGE>   2
4.   STOCK ISSUANCE. Executive shall be issued two million shares (2,000,000)
shares of the Company's common stock at a price of $.001 per share upon
execution of this Agreement. These shares shall be registered by the Company if
Executive is terminated without cause.

5.   STOCK OPTIONS. During each year Executive is employed by the Company,
Executive shall receive cashless options exercisable at $5.00 per share, equal
in value to five-percent (5%) of the Company's gross sales for that year. Should
Executive be terminated without cause, or terminated or demoted because of a
corporate reorganization and/or takeover/acquisition, or should there be a
change in control of fifty-one-percent (51%) or more by a single shareholder or
shareholder group (all these described events collectively defined as ("Control
Event"), all options accrued at the time of the Control Event shall vest
immediately at the rate described above for the gross sales at the time of the
Control Event, or five-percent (5%) of the price paid for the change in control
(as calculated by an independent professional appraiser), whichever is greater.
Executive shall also participate in the Company's Incentive Stock Option
Program.

6.   BENEFITS. Executive shall receive the following fringe benefits in
addition to his base benefits, which shall be vested upon Executive's
commencement of employment with the Company:

               A.   Four weeks paid vacation during the first year of the
Initial Term. Five weeks paid vacation each year thereafter. Unused vacation
days in any year can be carried over and accumulated to subsequent years.

               B.   Six (6) personal/six days each year and up to six days off
per year for national holidays, such holidays being in addition to vacation
days.

               C.   Health Insurance (PPO), Dental Insurance, Disability
Insurance, and Life Insurance in the amount of $1,000,000.00 for Executive and
his dependents. Company shall pay the premiums required for these coverages on
Executive only.

               D.   Participation in the Company's 401K Plan, with matching
contributions made annually by the Company up to two-percent (2%) of
Executive's Base Salary for each year.

               E.   A Company vehicle, leased not to exceed $800 per month,
with the Company paying all lease, gasoline, maintenance and insurance costs.

               F.   Club membership fees up to a maximum of $3,500 per year.

               G.   Tax accounting reimbursement up to $1,500 per year, for
personal advisory services regarding Company stock and income tax filing.

               H.   Company shall pay Executive's attendance at seminars and
conferences that will enhance the Company's reputation, standing, or
profitability. Attendance at the described events shall not be categorized as
sick, personal, or vacation days.

                                       2
<PAGE>   3
7.   RELOCATION. If Executive agrees to a relocation from his present
employment locale and domicile, Company shall reimburse Executive for all
relocation expenses typical for executives, including domicile closing costs,
points and commissions, with the intent that executive does not incur any
financial loss in the overall cost of the relocation, with the exception of
purchase and sale prices of his changes in domiciles.

8.   COUNTERPARTS. This Addendum may be executed in counterparts, each of which
shall be deemed an original. All such counterparts together shall constitute
one and the same Agreement.

IN WITNESS WHEREOF, the parties hereto have caused this Addendum to be executed
as of the date first written above.

NET COMMAND TECH, INC.                          "Executive"

By: /s/ William R. Dunavant                      /s/ William R. Dunavant
   ----------------------------                 -----------------------------
    William R. Dunavant                          William R. Dunavant
    President

                                       3<PAGE>   1
                                                                   EXHIBIT 10.16

                           INTERIM CLOSING AGREEMENT

THIS INTERIM CLOSING AGREEMENT ("Interim Agreement") is entered into on April
26, 1999, by and among Satellite Access Systems Inc. ("SAS"), a Nevada
corporation with a principal address of 111 Second Avenue N.E., 16th Floor, St.
Petersburg, FL, all the SAS shareholders, all the SAS directors, and Corsaire,
Inc. ("Corsaire"), a Delaware corporation, with a principal business address of
62 Indian Trace, Suite 286, Weston, FL 33326, and provides as follows, in
consideration of the mutual promises, covenants, and representations contained
herein:

1.   OPERATING AGREEMENT. The parties are presently operating under a TAX FREE
ACQUISITION AGREEMENT ("Acquisition Agreement") dated April 21, 1999, in which
SAS and the SAS shareholders have provided for the exchange of 5,075,000 shares
of SAS common stock ("SAS Shares"), which represents one hundred-percent (100%)
of the outstanding and issued shares of SAS capital stock, to Corsaire in
return for 2,352,942 shares of Corsaire (restricted) common stock ("Corsaire
Shares"). The Corsaire shares shall be initially issued in a single master
certificate ("Master Certificate") in the name of SAS in accordance with the
escrow period requirements described in paragraph 3 below.

The parties agree that the Acquisition Agreement and this Interim Agreement
supersede the Letter of Intent dated April 9, 1999 between them, and that this
Interim Agreement and the Acquisition agreement supplement and operate
concurrently with each other.

2.   TAX FREE EXCHANGE; REGISTRATION EXEMPTION

(a)  TAX FREE EXCHANGE. The parties intend that the contemplated acquisition
reorganization be tax free pursuant to Section 368 of the Internal Revenue Code
of 1986. No revenue ruling or opinion of counsel is being sought in this regard.

(b)  REGISTRATION EXEMPTION. The parties hereto intend that the stock to be
exchanged under the Acquisition Agreement and this Interim Agreement shall be
exempt from the registration requirements of the Securities Act of 1933 (1933
Act), as amended, and applicable state statutes. The Corsaire shares issued
under this Agreement are Restricted Securities as that term is defined in Rule
144 under the 1933 Act, and shall not be offered for sale or otherwise
transferred except pursuant to an effective registration statement under the
1933 Act, or pursuant to an exemption from registration under the 1933 Act, the
availability of which must be established to Corsaire's satisfaction.

3.   DEFINITIVE AGREEMENT; OPERATION OF INTERIM AGREEMENT. The Definitive
Agreement between the parties, as that term is defined in the Acquisition
Agreement, (which shall be the final form memoralization of Corsaire's
acquisition of SAS), shall be completed by May 5, 1999. The parties agree to
the following closing procedures under this Interim Agreement:

(I)  Corsaire shall issue and deliver the Master Certificate to SAS; SAS shall
endorse and deliver the SAS Shares to Corsaire. The delivery of the SAS Shares
hereunder will result in Corsaire's immediate acquisition of record and
beneficial ownership of all of SAS's capital stock, free and clear of all liens
and encumbrances, subject to sub-sections (II)-(VII) below.
<PAGE>   2
Each SAS shareholder holds the authority to exchange their shares hereunder,
and has had full opportunity to discuss the exchange offer with Corsaire's
officers, and Corsaire has made all documentation addressing this exchange
available to the SAS shareholders.

The Corsaire Shares represented by the Master Certificate and issued and
delivered in accordance with the provisions of this Interim Agreement will be
and are duly authorized, validly issued, fully paid and nonassessable.

(II) The parties shall hold their respective shares received under this
exchange for a period of not less than thirty (30) and not more than forty-five
(45) days after execution of this Interim Agreement by all parties concerned
("Escrow Period"). Corsaire shall advise SAS if the Escrow Period will have a
forty-five (45) day duration prior to the end of the 30th day. The exchanged
shares shall be delivered to the stock escrow holders, who shall be the
attorneys for Corsaire (Thomas J. Hess, Esq., Thomas J. Hess, P.A.) and the
attorneys for SAS (David J. Sockol, Esq.). Corsaire's transmission of stock
issuance instructions to the Corsaire stock transfer agent shall be deemed
issuance and delivery of the Corsaire Shares. (See attached Composite Exhibit
A. (Instructions to Corsaire stock transfer agent)).

(III) During the Escrow Period, Corsaire will obtain an opinion letter from
special intellectual property counsel ("IP Opinion Letter") on the SAS
copyright(s) regarding validity and infringement. SAS will provide Corsaire
with its documentation for the SAS copyrights, which documentation shall be
governed by the confidentiality clauses of the Acquisition Agreement.

(IV) During the Escrow period, the parties shall complete all the disclosures,
schedules and exhibits that will be attached to the Definitive Agreement,
recognizing that the main body of the Definitive Agreement will be completed
prior to the end of the Escrow Period.

(V)  If during or at the conclusion of the Escrow Period the IP Opinion Letter
concludes that the SAS Copyright(s) are invalid or infringing, Corsaire will
assist SAS to cure the defect. If the SAS Copyright(s) cannot be cured, the
parties will endeavor to resolve the issues created by the defects, provided
that such resolution shall be cost effective and economically rational in
Corsaire's judgment.

(VI) If during or at the conclusion of the Escrow Period, the actual
liabilities of SAS are greater than Four Million Dollars ($4,000,000.00) SAS
will transfer back to Corsaire that amount of Corsaire Shares that equal the
excess liabilities, at a price of $12.75 per share.

(VII) The Escrow Period will be closed upon expiration of the Escrow Period.
Corsaire may, in writing, declare the Escrow Period closed at any time during
the Escrow Period. Upon the natural expiration of the Escrow Period or
declaration of its early closure, the exchanged shares shall be released from
escrow and SAS will advise Corsaire in writing as to the allocation of Corsaire
shares to be received by the SAS shareholders from the Corsaire Master
Certificate. This written allocation shall bear the concurring signatures of the
SAS shareholders. Corsaire shall immediately direct its transfer agent to issue
individual certificates to the SAS shareholders upon receipt of the written
allocation and Master Certificate.

                                       2
<PAGE>   3
4.   FURTHER ASSURANCES. The parties hereto each agree that from time to time,
as and when reasonably requested by the other, it will execute, acknowledge,
deliver and file all proper deeds, assurances, assignments, bills of sale,
assumptions and other documents, and do, or cause to be done, all other acts
and things necessary or proper in order to carry out the intent and purposes of
this Agreement at no cost or expense of the party requested.

5.   MISCELLANEOUS

(i)  AMENDMENTS. This Agreement may only be amended via written document by all
parties, provided that all requisite director and shareholder approvals are
obtained for any material amendments to the terms set forth in this Agreement.

(ii) AGREEMENT TERMINATION PROCEDURES. If the parties are unable to consummate
a Definitive Agreement, the Acquisition Agreement and this Interim Agreement
shall be deemed terminated and: (1) Corsaire shall immediately effect the
return of the SAS Shares to SAS with all endorsements canceled, and (2) SAS
shall immediately effect the return of the Corsaire Master Certificate to
Corsaire.

(ii) LIABILITIES, ATTORNEY FEES AND COSTS IN EVENT OF TERMINATION. In the event
of the termination of this Agreement for any reason, each party shall bear its
own costs and expenses, including attorney fees, and the parties shall have no
further legal obligation to each other, or be liable for any damages to each
other as a result of the termination of this Agreement and/or the Acquisition
Agreement.

(iii) PROPER PARTIES TO THE AGREEMENT. SAS confirms that the parties signing
this Initial Agreement represent all the SAS shareholders and directors, and
that there are no dissenting shareholders or directors.

(iv) NON-WAIVER. Except as expressly provided in this Initial Agreement, no
waiver of any covenant, condition, or provision of this agreement, shall be
deemed to have been made unless made expressly in writing and signed by the
party against whom such waiver is charged; and (a) the failure of any party to
insist in any one or more cases upon the performance of any of the provisions,
covenants, or conditions of this Initial Agreement shall not be construed as a
waiver or relinquishment for the future of any such provisions, covenants, or
conditions; and (b) the acceptance of performance of anything required to be
performed hereunder with the knowledge of the breach or failure of a covenant,
condition, or provision hereof shall not be deemed a waiver of such breach or
failure.

                                       3
<PAGE>   4
(v)  GOVERNING LAWS; SUCCESSORS AND ASSIGNS; COUNTERPARTS; ENTIRE AGREEMENT.
This Agreement (a) shall be construed under and in accordance with the internal
laws of the state of Florida, excluding conflict of laws principles; (b) shall
be binding on and shall inure to the benefit of the parties to the Agreement
and their respective successors and assigns; (c) may be executed by
telefacsimile and/or in one or more counterparts, all of which shall be
considered one and the same agreement, and shall become effective when one or
more counterparts shall have been signed by each of the parties and delivered
to SAS and Corsaire; and (d) embodies the entire agreement and understanding,
superseding all prior agreements and understandings between the parties hereto
relating to the subject matter of this Agreement.

IN WITNESS WHEREOF, each of the parties hereto has caused this Initial
Agreement to be executed by their duly authorized officers and in their
individual and official capacities, as the case may be, effective as of the
date first written above.

Corsaire, Inc.                                 Satellite Access Systems Inc.

By: /s/ William R. Dunavant                    By: /s/ Glenn A. Kovar
   ------------------------------                 --------------------------
   William R. Dunavant                            Glenn A. Kovar,
   President                                      President

SAS SHAREHOLDERS:

/s/ Illegible
---------------------------------              -----------------------------
[name] Director                                [name] Director

/s/ Brent Kovar
---------------------------------              -----------------------------
[name] Director                                [name]

---------------------------------              -----------------------------
[name]                                         [name]

SAS DIRECTORS:

---------------------------------              -----------------------------
[name]                                         [name]

---------------------------------              -----------------------------
[name]                                         [name]

                                       4
<PAGE>   5
                     ADDENDUM TO INTERIM CLOSING AGREEMENT

THIS ADDENDUM dated May 14, 1999, by and among Satellite Access Systems Inc.
("SAS"), a Nevada corporation with a principal address of 111 Second Avenue
N.E., 16th Floor, St. Petersburg, FL and Net Command Tech, Inc. (f/k/a Corsaire,
Inc.), a Delaware corporation, with a principal business address of 62 Indian
Trace, Suite 286, Weston, FL 33326, and provides as follows, in consideration
of the mutual promises, covenants, and representations contained herein:

WHEREAS, the parties entered into that certain Interim Closing Agreement of
April 26, 1999 by and among Net Command Tech, Inc. (formerly Corsaire, Inc.),
SAS, the SAS shareholders, and the SAS directors;

WHEREAS, the president of SAS is empowered by the above-named SAS parties to
execute this Addendum; and

WHEREAS, the parties have decided to waive the requirement of a Definitive
Agreement (originally scheduled for May 5, 1999) as that term is defined in the
Acquisition Agreement and execute a final closing memorandum in its place on or
before the expiration of the due diligence period;

NOW, THEREFORE, in consideration of the mutual promises contained herein and in
the Agreement and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows:

1.   PRECEDENCE AND INCORPORATION. This Addendum forms a part of the Interim
Closing Agreement and Acquisition Agreement. The Agreement and this Addendum
shall be considered one document. The terms contained in this Addendum shall
take precedence over any Agreement terms that are inconsistent with this
Addendum. Terms used in this Addendum shall have the same meaning as ascribed
to them in the Agreement.

2.   WAIVER OF DEFINITIVE AGREEMENT. The parties are presently operating under
the Interim Closing Agreement which scheduled a DEFINITIVE CLOSING AGREEMENT by
May 5, 1999. The parties hereby waive the Definitive Closing Agreement, and
will proceed to a final closing memorandum to be executed on or before the
expiration of the due diligence period described in the Interim Closing
Agreement.

3.   COUNTERPARTS. This Addendum may be executed in counterparts, each of which
shall be deemed an original. All such counterparts together shall constitute
one Agreement.

IN WITNESS WHEREOF, the parties hereto have caused this Addendum to be executed
as of the date first written above.

                                        Satellite Access Systems Inc.

By: /s/ William R. Dunavant             By: /s/ Glenn A. Kovar
   --------------------------              ---------------------------
   William R. Dunavant,                    Glenn A. Kovar,
   President                               President

<PAGE>   6
                  SECOND ADDENDUM TO INTERIM CLOSING AGREEMENT

THIS SECOND ADDENDUM dated June 2, 1999, by and among Satellite Access Systems
Inc. ("SAS"), a Nevada corporation with a principal address of 111 Second
Avenue N.E., 16th Floor, St. Petersburg, FL and Net Command Tech, Inc. ("NTC,"
f/k/a Corsaire, Inc.), a Delaware corporation, with a principal business
address of 62 Indian Trace, Suite 286, Weston, FL 33326, and provides as
follows, in consideration of the mutual promises, covenants, and
representations contained herein:

WHEREAS, the parties entered into that certain Interim Closing Agreement of
April 26, 1999, and Addendum to Interim Closing Agreement of May 14, 1999
("First Addendum") by and among NTC (formerly Corsaire, Inc.), SAS, the SAS
shareholders, and the SAS directors;

WHEREAS, the president of SAS is empowered by the above-named SAS parties to
execute this Second Addendum; and

WHEREAS, the parties have decided to confirm and clarify Paragraph 3 VI of the
Interim Closing Agreement which addresses the procedure for SAS liabilities
exceeding four million dollars ($4,000,000.00).

NOW, THEREFORE, in consideration of the mutual promises contained herein and in
the Agreement and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows:

1.   PRECEDENCE AND INCORPORATION. This Second Addendum forms a part of the
First Addendum, the Interim Closing Agreement and the Acquisition Agreement. The
Agreement and this Second Addendum shall be considered one document. The terms
contained in this Second Addendum shall take precedence over any Agreement
terms that are inconsistent with this Addendum. Terms herein shall have the
same meaning as ascribed to them in the above-noted Agreements.

2.   INDEMNIFICATION. SAS and the SAS Stockholders, severally agree to
indemnify and hold Net Command Tech, Inc. harmless from and against any and all
liabilities, damages, losses, claims, demands, costs, or expenses (including
interest, penalties, reasonable attorneys' and accountants' fees and expenses,
court costs, and fees of expert witnesses) (all of the foregoing hereinafter
collectively referred to  as the "Claims") which NTC shall suffer or incur in
excess of four million dollars ($4,000,000.00) ("Indemnification Sum"), whether
liquidated or unliquidated, accrued or contingent, connected with or arising
out of any Claims that existed or arose prior to June 10, 1999. This
indemnification shall survive until the expiration of the statute of
limitations attached to any individual or aggregate Claims (pursuant to the
respective laws governing the Claim(s));

Claims that exceed the Indemnification Sum, individually or in the aggregate,
shall be indemnified by the return of the NTC shares (represented in the Master
Certificate) to NTC in that amount exceeding the Indemnification Sum, as
calculated using a value of $12.75 per share. An amount of 235,295 shares from
the Master Certificate shall be reserved and held in escrow until the Claims
are determined to be settled or paid in full.

<PAGE>   7
3.   DISPOSITION OF ESCROWED SHARES. If Claims associated with existing SAS
transactions with Virtual Products, Inc. ("VPI") and GRGI exceed the
Indemnification Sum, or cause the Indemnification Sum to be exceeded, and the
NTC stock held in escrow must be used to settle or fully pay such Claims, then
any balance of escrowed NTC stock remaining after the settlement or payment in
full of the VPI and GRGI claims shall be returned to the SAS shareholders within
sixty (60) days after the fully executed settlements are implemented or payment
is made in full. If Claims associated with SAS transactions with VPI and GRGI
are settled without need for the escrowed NTC shares, then all the escrowed NTC
shares shall be returned to the SAS stockholders within sixty (60) days after
the settlements are fully executed and implemented.

4.   STOCKHOLDER OBLIGATIONS. Each of the undersigned SAS Stockholders hereby
acknowledges his or her obligation under this Second Addendum. Each SAS
stockholder further agrees to approve the transfer of his or her NTC shares in
that pro rata and aggregate amount that will comprise and constitute the NTC
shares held in escrow to pay Claims in excess of the Indemnification Sum.
These escrowed shares shall be contributed on an equal basis from all SAS
stockholders.

If the Claims exceed the Indemnification Sum and the escrowed shares are not
sufficient to pay or settle the Claims in full, each SAS stockholder further
agrees to and approves the transfer of his or her pro-rata share of the
1,568,628 shares that will be distributed to them once the threshold of NTC
sales described in Paragraph 2 of the Tax Free Acquisition Agreement
($10,000,000.00) has been met.

Each of the undersigned SAS Stockholders waives any right to require NTC to (i)
proceed against SAS if the NTC shares held in escrow are insufficient to pay or
settle the Claims in full; or (ii) proceed against any other SAS Stockholder
beyond the stockholder's pro rata obligation under this Addendum. Each of the
undersigned SAS Stockholders further waives any right of subrogation,
reimbursement, contribution, or indemnity up to their pro rata obligation
hereunder against or from SAS. Each of the undersigned SAS Stockholders further
waives the benefit of any statute of limitations affecting SAS liability with
respect to the Claims set forth above.

5.   COUNTERPARTS. This Addendum may be executed, in counterparts, each of
which shall be deemed an original. All such counterparts together shall
constitute one Agreement.

IN WITNESS WHEREOF, the parties hereto have caused this Addendum to be executed
as of the date first written above:

Corsaire, Inc.                               Satellite Access Systems Inc.

By: /s/ William R. Dunavant                  By: /s/ Brent Kovar
   ------------------------------               --------------------------
   William R. Dunavant,                         Brent Kovar,
   President                                    Executive Vice President

                                       2
<PAGE>   8
SAS SHAREHOLDERS:

/s/ Illegible
-----------------------                 --------------------------
[name]:                                 [name]:

/s/ Joy Kovar
-----------------------                 --------------------------
[name]:                                 [name]:

/s/ Brent Kovar
-----------------------                 --------------------------
[name]:                                 [name]:

SAS DIRECTORS:

/s/ Illegible
-----------------------                 --------------------------
[name]:                                 [name]:

/s/ Brent Kovar
-----------------------                 --------------------------
[name]:                                 [name]:

                                       3
<PAGE>   9
                  THIRD ADDENDUM TO INTERIM CLOSING AGREEMENT

THIS THIRD ADDENDUM dated June 10, 1999, by and among Satellite Access Systems
Inc. ("SAS"), a Nevada corporation, with a principal address of 111 Second
Avenue N.E., 16th Floor, St. Petersburg, FL and Net Command Tech, Inc.
("NTC," f/k/a Corsaire, Inc.), a Delaware corporation, with a principal
business address of 62 Indian Trace, Suite 286, Weston, FL 33326, and provides
as follows, in consideration of the mutual promises, covenants, and
representations contained herein:

WHEREAS, the parties entered into the certain Interim Closing Agreement of
April 26, 1999, by and among NTC, SAS, the SAS shareholders, and the SAS
directors;

WHEREAS, the parties entered into that certain Addendum to Interim Closing
Agreement of May 14, 1999 ("First Addendum") and the Second Addendum to Interim
Closing Agreement of June 2, 1999 ("Second Addendum");

WHEREAS, the president of SAS is empowered by the above-named SAS parties to
execute this Addendum; and

WHEREAS, the parties have agreed to extend the closure of the due diligence
period until June 16, 1999 to enable the final preparation and issuance of an
intellectual opinion letter confirming the non-infringement and valid title of
the SAS copyright, Magic Modules.

NOW, THEREFORE, in consideration of the mutual promises contained herein and in
the Agreement and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows:

1.   PRECEDENCE AND INCORPORATION. This Addendum forms a part of the Interim
Closing Agreement and Acquisition Agreement. The Agreement and this Addendum
shall be considered one document. The terms contained in this Addendum shall
take precedence over any Agreement terms that are inconsistent with this
Addendum. Terms used in this Addendum shall have the same meaning as ascribed
to them in the Agreement.

2.   EXTENSION OF CLOSURE OF DUE DILIGENCE. The parties are presently operating
under the Interim Closing Agreement, the First Addendum and the Second
Addendum. In the First Addendum, the parties waived the Definitive Closing
Agreement, and agreed to proceed to a final closing memorandum to be executed
on or before the expiration of the due diligence period described in the
Interim Closing Agreement. The due diligence period expired on June 10, 1999.
The intellectual opinion letter confirming the non-infringement and valid title
of the SAS computer source code copyright requires additional finalization.
Accordingly, the parties hereby agree to extend closure of the due diligence
period until June 16, 1999 to complete the copyright due diligence, and shall
execute the final closing memorandum on or before June 18, 1999.

3.   COUNTERPARTS. This Addendum may be executed in counterparts, each of which
shall be deemed an original. All such counterparts together shall constitute
one Agreement.
<PAGE>   10
IN WITNESS WHEREOF, the parties hereto have caused this Addendum to be executed
as of the date first written above.

Corsaire, Inc.                               Satellite Access Systems Inc.

By: /s/ William R. Dunavant                  By: /s/ Glenn A. Kovar,
   --------------------------                   --------------------------
   William R. Dunavant,                         Glenn A. Kovar,
   President                                    President

SAS SHAREHOLDERS:

/s/ Illegible
------------------------------                -----------------------------
[name]:                                       [name]:

------------------------------                -----------------------------
[name]:                                       [name]:

------------------------------                -----------------------------
[name]:                                       [name]:

SAS DIRECTORS

/s/ Illegible
------------------------------                -----------------------------
[name]: Director                              [name]:

------------------------------                -----------------------------
[name]:                                       [name]:

                                       2

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00003-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00003-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00003-of-00352.parquet"}]]