**EXHIBIT10.3****1****st****AMENDMENT TO LEASE**This First Amendment To Lease is made and entered intothis 29th day of April, 2005, by andbetween HEALTHCALC NEI, INC., hereinafter referred to as “Tenant” and Parkway Commons, LP, anOklahoma limited partnership (formerly CMD Realty Investment Fund, II. Ltd), hereinafter referredto as “Landlord”;Whereas, Landlord and Tenant agree that they are the rightful parties to that certain leaseagreement dated September 29, 2003 for Suite 199 at 5068 W. Plano Parkway, Plano, Texas 75093, andwhereas Parkway Commons LP (successor Landlord) and Tenant desire to modify and extend said lease;Now, therefore, in consideration of the premises and other good and valuable consideration receiptof which is hereby acknowledged the above referenced lease is amended as follows: 1. Anytime after June 1, 2005, Tenant will relocate to Suite 290 (“The Premises”)comprised of 4,036 rentable square feet as indicated on “Exhibit A”, attached hereto andmade a part of this lease. Tenant will have no further obligations(s) regarding Suite 199after July 1, 2005  2. The lease shall be extended to June 30, 2008  3. Tenant’s minimum monthly base rent for May, 2005 shall be $2,887.17  4. Tenant’s minimum monthly base rent for June, 2005 shall be $1,887.17  5. Tenant’s minimum monthly base rent beginning July 1, 2005 shall be as follows:     Period Monthly RentJuly 1, 2005 to June 30, 2006 $6,222.00 July 1, 2006 to June 30, 2007 $6,390.00 July 1, 2007 to June 30, 2008 $7,399.00  6. Tenant accepts the Space in its “as is” condition, however, landlord agrees toinstall one building standard door, install four power poles, paint and re-carpet thepremises with building standards materials  7. Landlord agrees Tenant has the Right of First Offer on Suite 295, consisting ofapproximately 1,222 RSF, contiguous with the premises, and as indicated on “Exhibit A”attached hereto, at the same rental rate which is then in effect under said FirstAmendment to Lease when Tenant exercises its Right of First Offer. Tenant agrees toeither accept or decline the space within 5 business days of Landlord’s written notice ofintent to lease. If written notice is not received by Landlord by the close of businesson the fifth day, Tenant’s option becomes null and void
 

 
 8. Tenant agrees to pay all real estate commission for broker services rendered innegotiation of said lease to Transwestern Commercial Services totaling $7,5000.00Except with the express provision hereof, the lease shall remain in full force and effect inaccordance with all the terms and provisions contained therein and each and every term of saidlease shall apply.             LANDLORD   TENANT               Parkway Commons, Limited Partnership   HEALTHCALC NEI, INC.  an Oklahoma limited partnership                                  By: Acron Parkway Commons, L.L.C.   By: /s/ Peter A. Egan  An Oklahoma limited liability company     Peter A. Egan, President    its Managing Member                       By: Acron (USA) LP            A Texas limited partnership            its sole member                       By: Acron US Management, Inc.            A Nevada Corporation            its General Partner                       By: /s/ Greg W. Wilson             Greg W. Wilson, President