Document:

<PAGE>   1

                                                                    EXHIBIT 10.7
                      EMPLOYMENT AGREEMENT OF BRIAN GUSTAS

                              ZENEX COMMUNICATIONS
                              EMPLOYMENT AGREEMENT

         THIS EMPLOYMENT AGREEMENT (the "Agreement") is made this 28th DAY OF
NOVEMBER, 2000 between ZENEX LONG DISTANCE INC., an Oklahoma corporation with
its principal place of business in Oklahoma City, Oklahoma, and BRIAN D. GUSTAS
(the "Employee"); whose Social Security Number is ###-##-####.

         WHEREAS, the parties hereto wish to enter into an employment agreement
to employ the Employee as the PRESIDENT & CEO of ZENEX LONG DISTANCE, INC. DBA
ZENEX COMMUNICATIONS (the "Company"), and to set forth certain additional
agreements between the Employee and the Company.

         NOW, THEREFORE, in consideration of the mutual covenants and
representations contained herein, the parties hereto agree as follows:

1. TERM

     The Company will employ the Employee, and the Employee will serve the
Company, under the terms of this Agreement for an initial term of three (3)
years (the "Initial Term"), commencing on the official closing date of the
merger of Lone Wolf Energy, Inc. and Prestige Investments, Inc (the "Effective
Date").

2.  EMPLOYMENT

     (a) POSITIONS AND REPORTING. The Company hereby employs the Employee for
         the Employment Period as its President & CEO on the terms and
         conditions set forth in this Agreement. During the Employment Period,
         the Employee shall report directly to the President of the parent
         company, Lone Wolf Energy, Inc.

     (b) AUTHORITY AND DUTIES. The Employee shall exercise such authority,
         perform such Employee duties and functions and discharge such
         responsibilities as are reasonably associated with the Employee's
         positions, commensurate with the authority vested in the Employee
         pursuant to this Agreement and consistent with the bylaws of the
         Company. During the Employment Period, the Employee shall devote full
         business time, skill and efforts to the business of the Company.

3.  COMPENSATION AND BENEFITS

     (a) SALARY. During the Employment Period, the Company shall pay to the
         Employee, as compensation for the performance of his duties and
         obligations under this Agreement, a base salary at the rate of $120,000
         per annum, payable in not less frequently than BI-monthly in accordance
         with the normal payroll practices of the Company (the "Base Salary").

     (B) PROFIT BONUS. Employee will receive a bonus of 10% of the net profits
         from operations ("Profits"). The description of the plan can be found
         in Exhibit 3.15 of the Agreement and Plan of Reorganization between
         Lone Wolf Energy, Inc. and Prestige Investments, Inc. For the entirety
         of the initial term, the total cash compensation from the profit bonus
         will be caped at $130,000 per annum. Once this cap is reached in any
         given payroll year started or ended within the initial term, all
         additional Profit bonus continue to be calculated as specified in the
         Exhibit 3.15 of the above referenced agreement but will be converted to
         additional Stock Options. The formula for which is outlined below in
         section 3.(c)(ii).

     (c) STOCK OPTIONS. (i) Employee will be awarded the option to purchase
         250,000 shares of stock at a purchase price of eleven cents ($0.11) per
         share at the effective date and up to 750,000 additional shares over a
         3 year period from the effective date. The 750,000 additional shares
         will be set at the same price of eleven cents ($0.11) per share and
         will be allotted in groups of 250,000 each year on the anniversary of
         the effective date. (ii) Each Bonus dollar earned above the $130,000 as
         described in 3.(b) Profit Bonus, will be converted and granted to
         employee in the form of options of 4 shares of stock at a purchase
         price of eleven cents ($0.11) per share or the cash equivalent of the
         bonus as determined to be in the companies best interest. Any options
         granted, shall be available for up to five (5) years.

     (d) OTHER BENEFITS. During the Employment Period, the Employee shall
         receive such other life insurance, pension, disability insurance,
         health insurance, holiday, vacation and sick pay benefits and other
         benefits which the Company extends, as a matter of policy, to its
         employees and, except as otherwise provided herein, shall be

<PAGE>   2

         entitled to participate in all deferred compensation and other
         incentive plans of the Company on the same basis as other like
         employees of the Company.

     (e) BUSINESS EXPENSES. During the Employment Period, the Company shall
         promptly reimburse the Employee for all documented reasonable business
         expenses incurred by the Employee in the performance of his duties
         under this Agreement, in accordance with the Company's policies and
         standards of similar or comparable companies.

4.   TERMINATION OF EMPLOYMENT

     (a) TERMINATION FOR CAUSE. The Company may terminate the Employee's
         employment hereunder for cause. For purposes of this Agreement and
         subject to the Employee's opportunity to cure as provided in Section
         4(c) hereof, the Company shall have "cause" to terminate the Employee's
         employment hereunder if Employee shall commit any of the following:

         (i)      any act or omission which shall represent a breach in any
                  material respect of any of the terms of this Agreement;

         (ii)     bad faith in the performance of Employee's duties, consisting
                  of willful acts or omissions, to the detriment of the Company;

         (iii)    use of illegal drugs or alcoholism; or

         (iv)     any conviction or pleading of guilty to a crime that
                  constitutes a felony under the laws of the United States or
                  any political subdivision thereof.

     (b) TERMINATION FOR GOOD REASON. The Employee shall have the right at any
         time to terminate his employment with the Company for good reason. For
         purposes of this Agreement and subject to the Company's opportunity to
         cure as provided in Section 4(c) hereof, the Employee shall have "good
         reason" to terminate his employment hereunder if such termination shall
         be the result of:

         (i)      a diminution during the Employment Period in the Employee's
                  title, duties, reporting relationship or responsibilities as
                  set forth in Section 2 hereof;

         (ii)     a breach by the Company of the compensation and benefits
                  provisions set forth in Section 3 hereof;

         (iii)    a material breach by the Company of any material terms of this
                  Agreement.

     (c) NOTICE AND OPPORTUNITY TO CURE. Notwithstanding the foregoing, it shall
         be a condition precedent to the Company's right to terminate the
         Employee's employment for "cause" and the Employee's right to terminate
         his employment for "good reason" that (1) the party seeking the
         termination shall first have given the other party written notice
         stating with specificity the reason for the termination ("breach") and
         (2) if such breach is susceptible of cure or remedy, a period of 30
         days from and after the giving of such notice shall have elapsed
         without the breaching party having effectively cured or remedied such
         breach during such 30-day period, unless such breach cannot be cured or
         remedied within 30 days, in which case the period for remedy or cure
         shall be extended for a reasonable time (not to exceed 30 days)
         provided the breaching party has made and continues to make a diligent
         effort to effect such remedy or cure.

     (d) TERMINATION UPON DEATH OR PERMANENT AND TOTAL DISABILITY. The
         Employment Period shall be terminated by the death of the Employee. The
         Employment Period may be terminated by the Company if the Employee
         shall be rendered incapable of performing his duties to the Company by
         reason of any medically determined physical or mental impairment that
         can be expected to result in death or that can be expected to last for
         a period of six or more consecutive months from the first date of the
         disability ("Disability"). If the Employment Period is terminated by
         reason of Disability of the Employee, the Company shall give 30-days'
         advance written notice to that effect to the Employee.

5. CONSEQUENCES OF TERMINATION

     (a) SALARY. If the employer terminates this agreement for cause as stated
         in section 4(a), no further benefits will be granted employee. If
         Employee terminates this agreement with out good reason, good reason is
         defined in section 4(b), no further benefits will be granted employee.
         If the employer terminates this agreement without cause, cause is
         defined in section 4(a), the

<PAGE>   3

         salary will continue to be paid as prescribed in this agreement unless
         the company exercises its buy out option described in section 5(c).

     (b) OTHER BENEFITS. If this agreement is terminated for any reason by
         either party, all other benefits cease. Employee will not be eligible
         for stock option rights which accrue at a date subsequent to the
         termination of this agreement. All stock options earned prior to the
         termination of this agreement will remain the property of the employee.

     (c) AGREEMENT BUY OUT. The Company may exercise a right to terminate this
         agreement at anytime with or without cause for a lump sum payment of
         $100,000.

6. DAMAGES

         For breach or non-fulfillment of this agreement, neither party shall be
         liable or responsible to the other party for any consequential or in
         consequential damages not specifically referenced within this
         agreement.

IN WITNESS WHEREOF, THE PARTIES HAVE EXECUTED THIS AGREEMENT AS OF NOVEMBER 28,
2000.

                             ZENEX LONG DISTANCE, INC.  DBA ZENEX COMMUNICATIONS

                             ---------------------------------------------------
                                                                 BY: MARC NEWMAN
                                                          ON BEHALF OF THE BOARD

                             ---------------------------------------------------
                                                                            DATE

                                                                    BRIAN GUSTAS

                             ---------------------------------------------------
                                                                BY: BRIAN GUSTAS

                             ---------------------------------------------------
                                                                            DATE<PAGE>   1

                                                            EXHIBIT (10) (iii)

                     THIRD AMENDMENT TO EMPLOYMENT AGREEMENT

         THIS THIRD AMENDMENT TO THE EMPLOYMENT AGREEMENT dated as of September
1, 1999, as amended July 10, 2000, and October 2, 2000, (the "AGREEMENT") by and
between Commercial Metals Company, a Delaware corporation (the "COMPANY"), and
Murray R. McClean (the "EXECUTIVE") is made this 28th day of March, 2001.

                                    RECITALS:

         WHEREAS, the Company and the Executive entered into an Employment
Agreement as of September 1, 1999, which was amended by a First Amendment dated
July 10, 2000; and a Second Amendment dated October 2, 2000; and

         WHEREAS, the Company and the Executive wish to further amend the
Agreement to provide Executive with funds for unanticipated expenses incurred by
the Executive and related to the Executive's relocation from Australia to the
United States;

         NOW THEREFORE, in consideration of the mutual covenants and agreements
contained herein, the Company and Executive agree to amend the Agreement to add
to Article I, Section 1.4 Compensation a new paragraph 1.4(k) which shall read
as follows:

         (k)      Additional Loan. In addition to the mortgage relocation loan
                  and the other relocation expense loan referred to Paragraph
                  1.4(i), the Company shall loan the Executive an additional
                  Forty Thousand Dollars ($40,000.00) to be drawn down as
                  requested by the Executive on or before April 16, 2001. This
                  additional loan shall be evidenced by an appropriate
                  promissory note providing for payment of accrued interest in
                  ten equal payments of principal, each in the amount of Four
                  Thousand Dollars ($4,000.00), to be deducted from Executive's
                  net after-tax annual bonus payment as may be made by the
                  Company to Executive in October of each year commencing in
                  October, 2001. Should any annual bonus payment due Executive
                  not equal the installment then due, the unpaid balance of
                  principal only shall be added to the next year's installment
                  with all the remaining unpaid principal balance and accrued
                  interest due and payable on or before October 31, 2010. All
                  accrued interest for each period preceding a installment
                  payment date shall be paid by Executive no later than October
                  31 of each year either by deduction from Executive's net after
                  tax annual bonus payment or directly by Executive if the bonus
                  payment is not sufficient. The note evidencing this additional
                  loan shall further provide that it shall be due and payable in
                  full within 120 days of the termination of the Executive's
                  employment with the Company for any reason. Furthermore, the
                  note shall provide for interest at a rate equal to the
                  one-year United States Treasury constant maturity rate for the
                  month of July, 2000, as published by the Federal

<PAGE>   2

                  Reserve Board of Governors plus one percent (1%) and shall be
                  adjusted commencing September 1, 2001 and annually each
                  September 1 thereafter to the then most recently published one
                  year constant maturity rate for the month of July of each
                  succeeding year plus one percent (1%). At the option and
                  expense of the Company, the Executive's obligations under the
                  note may be secured by a second mortgage note on the
                  Australian Property.

         Except as specifically provided herein, the Agreement is in all
respects ratified and confirmed, and all the terms, conditions and provisions
thereof shall be and remain in full force and effect for any and all purposes.
From and after the date of this Third Amendment, any and all references to the
Agreement shall refer to the Agreement as amended by the First, Second and Third
Amendments.

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

                                         /s/ MURRAY R. McCLEAN
                                         ------------------------------------
                                         MURRAY R. McCLEAN

                                         COMMERCIAL METALS COMPANY

                                         BY: /s/ STANLEY A. RABIN
                                            ---------------------------------
                                             STANLEY A. RABIN
                                             Chairman, President and
                                             Chief Executive Officer

                                       2

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00023-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00023-of-00352.parquet"}]]