Document:

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EXHIBIT 10.4

                     CUSTOMER INTERACTION SERVICE AGREEMENT

         THIS CUSTOMER INTERACTION SERVICE AGREEMENT is entered into as of the
"start date" contained in Item 2 of Appendix A, attached hereto, by and between
Customer Direct, L.L.C., with an address of 714 Spirit 40 Park Dr, Suite 100,
Chesterfield Missouri 63005 ("CD,LLC") and SIERRA MEDICINALS, INC. ("Client"),
with an address of 2029 CENTURY PARK EAST SUITE 1112 LOS ANGELES, CA 90067
whereby CD,LLC shall provide order taking services, customer services and/or
telephone answering services to Client, such services to be performed by the
employees or third-party contractors of CD,LLC. All such persons shall be
referred to herein as "Contractor," and such term shall include the plural.

         1. TERM; DUTIES; COMPENSATION.

                  (a) The term of this Agreement shall begin as specified
pursuant to Item 2 on Appendix A, attached hereto and continue until terminated
by either party, as set forth hereafter (the "Service Period"). This Agreement
may be terminated with or without cause, upon sixty (60) days prior written
notice. This Agreement may also be terminated by either party for cause (as
hereinafter defined), effective upon posting of written notice by registered or
certified mail to the terminated party. For purposes of this Agreement, cause is
defined to mean (i) a material breach of this Agreement which remains uncured
for a period of ten (10) days after written notice thereof, (ii) fraud, gross
negligence or illegal or intentional misconduct by a party, or (iii) failure to
pay amounts due to CD,LLC hereunder. Upon such termination, Client will promptly
pay any amounts due to CD,LLC, which amounts shall include fees incurred up to
and including the actual date of termination.

                  (b) (i) CD,LLC's scope of services are specified in Item 1 of
Appendix A, attached hereto. CD,LLC shall use its best efforts and skills in
performing its duties under this Agreement; provided that CD,LLC shall not
undertake any illegal or illegitimate activities on behalf of Client, which
activity shall be determined in CD,LLC's sole discretion. By signing this
Agreement, Client represents and warrants that its services comply with all
applicable local, state, and Federal laws and regulations.

                           (ii) Client shall be responsible for advising CD,LLC
of any changes to be made involving any information necessary to properly handle
the calls received by CD,LLC on behalf of Client.

                           (iii) CD,LLC reserves the right to maintain the
confidentiality of its Contractors.

                  (c) Client shall pay to CD,LLC the monthly sum contained in
Item 4 of Appendix A, attached hereto for the services rendered hereunder.

         2. PAYMENT TERMS. All payments owed by Client to CD,LLC shall be paid
directly to CD,LLC within fourteen (14) days after mailing of invoices. Client
agrees to pay a bookkeeping charge of one percent (1%) per month of the
outstanding balance on past due invoices or $15 per month, whichever is greater.

         3. CONFIDENTIALITY. CD,LLC shall, and shall take reasonable steps to
cause its Contractors to keep all messages, orders and information transmitted
through any calls it receives on behalf of Client, confidential.

         4. LIMITATIONS OF LIABILITY. Not withstanding anything contained herein
CD,LLC's non-performance hereunder shall be excused if caused by equipment
failure, acts of god, strikes, equipment or facilities shortages or other cause
beyond CD,LLC control. In addition the liability, if any, of CD, LLC for any
mistake, omission, interruption, delay, error, defect or other failure in its
operation or service furnished, or in transmission of information over the
facilities used in furnishing service, shall in no event exceed the amount of
CD, LLC prorated monthly charge to client for service during the period so
affected. In no event shall CD, LLC be liable to Client and/or its customers,
users or any other person for any amount arising out of or connected with this

<PAGE>

agreement (except as specifically set forth in the preceding sentence) or for
any cost, delay, incidental, general or consequential damages, including but not
limited to lost profits, property damage, personal injury or death. Client
agrees to indemnify and hold CD, LLC, its officers, employees, agents and
affiliates harmless from and against any and all acts, actions, claims or
demands made or brought by Client's customers, former customers, or any third
party arising out of or in connection with the activities contemplated by this
agreement, even if occasioned by the sole negligence of CD, LLC, and against all
legal fees, costs and expenses incurred by CD, LLC in defending same, including
legal fees and costs incurred to establish the applicability of this paragraph.

         5. FORUM SELECTION. This Agreement shall be governed by the laws of
Missouri (USA) and Client agrees to personal jurisdiction of federal and state
courts in Missouri (USA) and that service of process may be made upon Client at
the address set forth above or any successor address in any manner permitted by
the laws of the State of Missouri (USA).

         6. LOCATION OF CONTRACT FORMATION. Both Client and CD,LLC agree that
this Agreement is entered into and made between the parties in Chesterfield, MO
(USA).

         7. INDEPENDENT CONTRACTORS: Both Client and CD,LLC agree that CD,LLC
will act as an independent contractor in performing its duties under this
contract. CD,LLC shall have no power or authority to bind Client contractually
or to enter into any commitments for Client for any purpose whatsoever, unless
mutually agreed to in writing between the parties.

         8. MISCELLANEOUS.

                  (a) This Agreement may not be assigned by Client without the
written consent of CD,LLC. This Agreement shall be binding on the successors and
assigns of the parties.

                  (b) This Agreement shall be governed and construed and
enforced in accordance with and subject to the laws of the State of Missouri,
without respect to conflicts of laws principles. In any dispute arising under
this Agreement, the prevailing party will be entitled to recover from the other
party reasonable attorneys' fees and costs of suit, including those incurred
preparing for any such dispute.

                  (c) All notices or other communications provided for by this
Agreement shall be made in writing and shall be deemed properly delivered when
(i) delivered personally, or (ii) by the mailing of such notice by overnight,
registered or certified mail, postage prepaid, to the parties at the addresses
first set forth in this Agreement (or to such other address as one party
designates to the other in writing).

                  (d) This Agreement contains the entire agreement and
understanding between the parties as to the matters covered herein and
supersedes any prior or contemporaneous written or oral agreements as to any
such matter. Parol evidence shall be inadmissible to show an agreement between
the parties as to any term or condition that is contrary to or addition to the
terms and conditions contained herein. This Agreement may be amended only by a
writing signed by CD,LLC and a duly authorized representative of Client. No
waiver of any term, provision, or condition of this Agreement shall be deemed to
be, or shall constitute, a waiver of any other term, provision, or condition
herein, whether or not similar. No such waiver shall be binding unless in
writing and signed by the waiving party.

                  (e) No supplement, modification, or amendment of any term,
provision, or condition of this Agreement shall be binding or enforceable unless
evidenced in writing executed by the parties hereto.

<PAGE>

                  (f) If any provision of this Agreement is declared invalid by
any tribunal, then such provisions shall be deemed automatically adjusted to the
minimum extent necessary to conform to the requirements for validity as declared
at such time and, as so adjusted, shall be deemed a provision of this Agreement,
as though originally included herein. In the event that the provision
invalidated is of such a nature that it cannot be so adjusted, the provision
shall be deemed deleted from this Agreement as though such provision had never
been included herein. In either case, the remaining provisions of this Agreement
shall remain in effect.

                  (g) Unless changed by notice to CD,LLC, Client's designated
contact person for all communications in connection with this Agreement is
indicated in Item 5 of Appendix A. CD, LLC's contact person shall be the account
representative.

         IN WITNESS WHEREOF, the parties have executed this document (including
Appendix A, which is hereby incorporated by reference) as of the date first
above written.

               "CD,LLC"                                     "CLIENT"

CUSTOMER DIRECT, L.L.C.                        SIERRA MEDICINALS, INC.

                                               By:______________________________
By: _______________________________________
    Richard Becerra, V.P.- Sales & Marketing   Title:___________________________
                                               Date:___/___/___

<PAGE>

                                   APPENDIX A

         This Appendix A is hereby incorporated by reference into that certain
Telephone Service Agreement, by and between CD,LLC and Client.

1. SCOPE OF SERVICES:
     CUSTOMER INTERACTION SERVICES
     800 SERVICES
     UP TO 2 HOURS OF INITIAL PROGRAMMING  (ACCOUNT SET UP)

2. START DATE OF THE ASSIGNMENT:

3. SET UP FEES ACCOUNT                                 $500
4. MONTHLY PAYMENTS FOR SERVICES RENDERED PURSUANT TO THIS AGREEMENT:
     Base Rate (Includes 450 Minutes)                  $ 495
     Additional Rate Minute                            $ .85
     Additional Programming/Account Maintenance        $50 /hour (as requested)

5. CONTACT PERSON:  NAME: __________________________________

                    COMPANY: _______________________________

ORGANIZATION TYPE:        CORPORATION       PARTNERSHIP      SOLE PROPRIETORSHIP

                    TAX ID #:_______________

                    ADDRESS: ___________________________

                             ___________________________

                    PHONE:   (_______)___________________

                    FAX:     (_______)___________________

                    E-MAIL:  _________________@_________________________

TO SET UP SERVICE PLEASE RETURN CUSTOMER INTERACTION SERVICE AGREEMENT,
INFORMATION FORM, FIRST MONTH BASE RATE, LAST MONTH BASE RATE AND SET UP FEES
(TOTAL $1490)

PAYMENT BY CREDIT CARD:
     NAME AS IT APPEARS ON CARD: _______________________________

     CARD TYPE:                  VISA              MASTERCARD         AMEX

     CARD NUMBER:                _______________________________

     EXPIRATION DATE:            _______________________________

                           By signature below I hereby authorize Customer Direct
                           to Charge the Credit Card above for all account
                           initiating fees and monthly fees.

     SIGNATURE:            X____________________________________

<PAGE>

                   CUSTOMER DIRECT EXTENDED CREDIT APPLICATION
                   -------------------------------------------

The Undersigned Company is applying for credit with Customer Direct, and agrees
to abide by the standard terms and conditions of the service agreement as
executed.

  Company Name  _______________________________________________________

  DBA (if different)  _________________________________________________

  Contact Person   ____________________________________________________

  Address: ____________________________________________________________

  Phone  (  ) __________________        Fax (  ) ______________________

  Federal Tax ID or Social Security No.________________________________

  Type of Business_____________________________________________________

  No. of Employees _______

  Date Business Established ___________________________________________

Are you a (check one) :
__  Corporation

         State of Incorporation  ______________________________________

         Names, Titles and Addresses of Your Three Chief Corporate Officers
         _________________________________________________________
         _________________________________________________________
         _________________________________________________________

__  Partnership
         Names and Addresses of the Partners
         _________________________________________________________
         _________________________________________________________
         _________________________________________________________

__  LLC
         Names and Addresses of the Managing Member(s)
         _________________________________________________________
         _________________________________________________________
         _________________________________________________________

__  Sole Proprietorship

Are you sales tax exempt? Yes _______  No _______

TRADE REFERENCES

  Name: _______________________________________________
  Address: ____________________________________________
  Phone (  ) __________________

  Name: _______________________________________________
  Address: ____________________________________________
  Phone: (  )__________________

  Name: _______________________________________________
  Address: ____________________________________________
  Phone (  ) __________________

<PAGE>

BANK REFERENCES

  Account #: ________________________  Phone (  ) __________________
  Contact Person: __________________________________________
  Name of Bank: ____________________________________________
  Address: _________________________________________________

  Account #: ________________________  Phone (  ) __________________
  Contact Person: __________________________________________
  Name of Bank: ____________________________________________
  Address: _________________________________________________

I REPRESENT THAT THE ABOVE INFORMATION IS TRUE AND IS GIVEN TO INDUCE CUSTOMER
DIRECT TO EXTEND CREDIT TO THE APPLICANT. MY COMPANY AND I AUTHORIZE CUSTOMER
DIRECT TO MAKE SUCH CREDIT INVESTIGATION AS CUSTOMER DIRECT SEES FIT, INCLUDING
CONTACTING THE ABOVE TRADE REFERENCES AND BANKS AND OBTAINING CREDIT REPORTS. MY
COMPANY AND I AUTHORIZE ALL TRADE REFERENCES, BANKS AND CREDIT REPORTING
AGENCIES TO DISCLOSE TO CUSTOMER DIRECT ANY AND ALL INFORMATION CONCERNING THE
FINANCIAL AND CREDIT HISTORY OF MY COMPANY AND MYSELF.

I have read the terms and conditions stated above and on the executed "Service
Agreement" and agree to abide by all of those terms and conditions.

  Authorized Signature:  _________________________________________

  Printed Name: __________________________________________________

  Title: ______________________________________

  Date:_____________EXHIBIT 10.1

         AGREEMENT OF ASSOCIATION FOR DEVELOPMENT OF REAL PROPERTY AND
                        CONSTRUCTION OF HOUSES IN MEXICO

         THIS AGREEMENT, with date June 22, 2004, puts the mutual agreements and
responsibilities of the signers that it will serve as the base of the agreement
definitive and detailed between the parts that later are described: CONSTRUCTOR
AND INMOBILARIA CIFASA S.A de C.V. ("CIFASA") and ADVANCED CONSTRUCTION and
MANUFACTURING TECHNOLOGIES DE MEXICO S.A. de C.V. ("ACMT"), SOUTHWEST MANAGEMENT
SOLUTIONS CORPORATION, a Corporation of Nevada ("SOWEST") and NOXSO CORPORATION,
("NOXSO") a Corporation of Virginia, as signers with particular interests and
related responsibilities

         WHEREAS, CIFASA wants to develop real property in Mexico (housing of
social interest) with properties that it owns in its name and other properties
where it has agreements to acquire in the future; and,

         WHEREAS, ACMT is a subsidiary of NOXSO, and it has a system for the
construction of housing with mutual agreement with SOWEST that will be
beneficial to the targets of CIFASA;

         THEREFORE, BOTH ARE IN ACCORDANCE WITH THE FOLLOWING CLAUSES:

                                  FIRST CLAUSE

CIFASA

CIFASA represents and warrants to ACMT and other signatories its
responsibilities in accordance with this Agreement and they are as follows:

         1. CIFASA owns or has the rights to 5 real estate projects of various
sizes which real estate shall be contributed to the project to assist ACMT with
its responsibility to obtain the financial resources to develop the real estate
and construct single family residences thereon. In the first 4 projects there
are a total of approximately 772 single family residential houses, approximately
520 one-bedroom houses in duplex format, and approximately 252 three bedroom
houses in duplex format (the "houses"). The fifth project is a large
multi-phase, mixed-use project that includes approximately 7,000 single family
residential homes in various formats, together with several commercial sites,
school and hospital areas and a shopping center site;

         2. CIFASA has obtained all of the required permits and licenses to
develop the first 4 projects and it will be responsible to obtain the required
permits and licenses for all phases of the fifth project that will be developed
and constructed by ACMT;

         3. CIFASA is responsible to work with and obtain from available
financial sources, including but not limited to INFONAVIT, FOVI and commercial
banks, for guaranteed total payment for the finished houses upon completion, and
hereby commits to work closely with the respective financial sources and obtain
such total payments upon completion of the houses and to promptly pay ACMT for
each completed house within 3 days of receipt of such payments from all
respective financial sources on each of the projects.

         4. CIFASA is responsible to use its association and experience to
obtain from various unions, syndicates and groups qualified and approved buyers
for the finished houses acceptable to the financial sources as set forth in
paragraph 3., above.

         5. CIFASA is responsible to participate and cooperate with ACMT, and to
obtain the approval of the other signatories, with the development of the range
of sales prices for the houses in each of the projects, and to participate and
cooperate with ACMT, and to obtain the approval of the other signatories, with
the development of cost budgets for each of the various types of houses in each
of the projects.

<PAGE>

                                  SECOND CLAUSE

ACMT

ACMT represents and warrants to CIFASA and other signatories its
responsibilities in accordance with this Agreement and they are as follows:

         6. ACMT has the management, staff and personnel with the experience and
capacity, and hereby commits to be responsible to develop real property from its
current condition to finished lots ready for the construction of houses, or as
sometimes referred to in Mexico as the `Urbanization' of the project; and,
additionally, to supervise the construction of the houses on the CIFASA projects
from inception to final completion in accordance with local regulations and
condition.

         7. ACMT has an in-place agreement with SOWEST and hereby commits to
employ SOWEST and its proprietary system of construction for cement pads and
footings, the construction of all of the walls in the houses using the concrete
masonry units of various types as recommended and approved by SOWEST, and to use
SOWEST in the construction of the roofs on all such houses

         8. ACMT will be responsible to obtain the financial resources for the
development/urbanization and construction costs on the projects, except for the
cost of the land that will be the responsibility if CIFASA, in accordance with
the budgets as agreed initially, or as revised, including but not limited to all
workers and support personnel as required to construct the pads, footings, walls
and roofs of the houses under the direction of SOWEST, and all sub-contractors
or others as required to complete the houses ready for occupancy.

         9. ACMT is responsible to work with and obtain from CIFASA total
payment for the finished houses upon completion, and hereby commits to work
closely with the CIFASA and the respective financial sources to obtain such
total payments upon completion of the houses and to promptly pay SOWEST, as well
as all other sub-contractors or personnel, in accordance with all contracts,
agreements and commitments, for each completed house, in accordance with the
terms and conditions as set forth in the definitive development and construction
agreements.

         10. ACMT is responsible to participate and cooperate with CIFASA, and
to obtain the approval of the other signatories, with the development of the
range of sales prices for the houses in each of the projects, and to participate
and cooperate with CIFASA, and to obtain the approval of the other signatories,
with the development of cost budgets for each of the various types of houses in
each of the projects.

                                  THIRD CLAUSE

SOWEST

SOWEST represents and warrants ACMT and other signatories its responsibilities
in accordance with this Agreement and they are as follows:

         11. SOWEST has the management, the personnel with the experience and
capacity, and hereby commits to be responsible for the supervision of the cement
pads, footings and foundations, interior and exterior walls, as well as the
second floor on 2 story houses, and the roof for all of the houses on the CIFASA
projects in accordance with the regulations and conditions of the local, State
and Federal governments of the Republic of Mexico.

<PAGE>

         12. SOWEST has an in-place agreement with ACMT and hereby commits to
use its best efforts, experience and expertise utilizing its proprietary system
of construction for cement pads, footings and foundations, the construction of
all of the interior and exterior walls, as well as the second floor on 2 story
houses, in the houses using such concrete masonry units of various types as meet
or exceed, in SOWEST'S sole discretion, the recommended and approved concrete
masonry units of the financial sources and/or the local regulations; and to use
its' techniques in the construction of the roofs on all such houses on behalf of
ACMT and share ACMT'S responsibility for such houses, but limited to only its
areas of construction.

         13. SOWEST is responsible to work with and obtain from ACMT and/or
CIFASA timely payment for the finished houses upon completion, and to promptly
pay in accordance with the terms and conditions as set forth in the definitive
construction agreement, all material and personnel costs related to the areas of
its responsibility on the CIFASA projects, as well as any and all other
sub-contractors or personnel utilized in the completion of its areas of
responsibilities under this Agreement, in accordance with all of its contracts,
agreements and commitments, upon receipt of payment for each completed house on
each of the projects; and,

         14. SOWEST is responsible to participate and cooperate with ACMT, and
to obtain the approval of the other signatories, with the development of the
range of sales prices for the houses in each of the projects, and to participate
and cooperate with CIFASA, and to obtain the approval of the other signatories,
with the development of cost budgets for each of the various types of houses in
each of the projects.

                                  FOURTH CLAUSE
NOXSO

NOXSO represents and warrants to CIFASA and the other signatories as that its
responsibilities under this Agreement are as follows:

         15. NOXSO has the responsibility to supervise, manage, approve and
financially support the responsibilities of its wholly owned subsidiary ACMT;

         16. NOXSO has an in-place agreement with SOWEST for the management and
assistance with several phases of its operations and some of the operations of
its wholly owned subsidiary ACMT, and hereby commits to use its best efforts,
experience and expertise utilizing its working relationship and agreements with
SOWEST for the benefit of the CIFASA projects using concrete masonry units as a
source of operational and financial assistance to ACMT;

         17. NOXSO is responsible to assist, as necessary, ACMT and/or CIFASA
for the timely payment for the finished houses upon completion; and

         18. NOXSO is responsible to participate and cooperate with ACMT, and to
obtain the approval of the other signatories, with the development of the range
of sales prices for the houses in each of the projects, and to participate and
cooperate with CIFASA, and to obtain the approval of the other signatories, with
the development of cost budgets for each of the various types of houses in each
of the projects.

<PAGE>

                     MUTUAL REPRESENTATION OF THE COMPANIES

         The Companies hereto, each individually represent and warrant to the
other Companies as follows:

         19. Organization: Each of the COMPANIES is a duly organized and validly
existing corporation in good standing under the laws of Mexico and/or the laws
of the State of incorporation. The Company is duly qualified to do business and
is in good standing in Mexico its principal domicile and may establish agencies
or branches in each jurisdiction in which it anticipates to do business.

         20. Authorization. All approvals and action on the part of CIFASA,
ACMT, SOWEST and NOXSO (the "COMPANIES"), if any, necessary for the due
authorization, execution and delivery of this Agreement and the consummation of
the transactions contemplated herein, has been or will be taken prior to or as
of the date of the final definitive agreements. This Agreement is a legal, valid
and binding agreement of the signatory companies, enforceable in accordance with
its terms. The execution, delivery and performance by companies, of this
Agreement, will not result in any violation of or be in conflict with, or result
in a breach of or constitute a default under, any term or provision of any legal
requirement, contract or agreement to which any of the COMPANIES is subject.

         21. Consents. No consent, approval, qualification, order or
authorization of, or filing with any governmental authority is required in
connection with the valid execution, delivery or performance of the this
Agreement, by the COMPANIES.

         22. Definitive agreements. The COMPANIES agree to prepare definitive
real property development and housing construction agreements that incorporate
the general terms and the conditions of this agreement and subsequent
negotiations between THE COMPANIES. These definitive agreements will be
completed before July 10, 2004, and shall contain, among other things, customary
representations, warrants and indemnifications. Such representations, warrants
and indemnifications will relate but not limited to the definitive costing for
development of each project as agreed to by CIFASA, ACMT and NOXSO, together
with the definitive costing of the construction of the houses as agreed to by
CIFASA, ACMT, SOWEST and NOXSO using the system of construction of SOWEST
including the specific terms, responsibilities, conditions and requirements for
each of the projects of CIFASA.

         23. Expenses. All the COMPANIES shall each bear its own expenses
(including, without limitation, legal and countable fees) incurred in connection
with the transactions contemplated in this agreement, but shall be entitled to
be reimbursed for all amounts recognized by the COMPANIES.

         24. Counterparts. This Agreement can be executed in any number of
original doubles or counterparts, each of which will be of equal force and
effect.

         25. Titles, Headings and Clauses. The Titles, Headings and Clauses of
this Agreement are for the convenience of reference by the COMPANIES and they
will not affect the construction of any provision of this Agreement.

<PAGE>

         The undersigned signatories have executed this Agreement as of the date
June 23, 2004, as witness that the terms and conditions contained herein
reflects our mutual understanding and agreement.

                           SIGNATURES OF THE COMPANIES

CONSTRUCTORA AND INMOBILARIA
 CIFASA S.A de C.V. (CIFASA)

  /s/ Javier Santa Maria
--------------------------------
By: Javier Santa Maria
Its:  Director and President

ADVANCED CONSTRUCTION and MANUFACTURING
 TECHNOLOGIES OF MEXICO S.A of C.V. (ACMT)

/s. Maximilliano Ismael Silva
-----------------------------------
By: Maximilliano Ismael Silva
Its: Director and Vice-President
     of Operations

SOUTHWEST MANAGEMENT SOLUTIONS CORPORATION (SOWEST)

  /s/ Wynn L. Westmoreland
----------------------------------
For: Wynn L. Westmoreland
Its: CEO and President

NOXSO CORPORATION (NOXSO)

/s/ Richard J. Anderson
-----------------------------
By: Richard J Anderson
Its: CEO and President

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