Changing from one payment gateway to another

On of my clients wishes to change from one payment gateway provider to another. I need a professional to look at the checkout pages and rewrite the present asp code from the current payment gateway provider to the new one. The two new payment gateway implementations are illustrated here: 1) [login to view URL] 2) [login to view URL] You can choose which ever one best matches the existing code to minimize the work that needs to be done. The current check out flow is the following: - add to shopping cart (stays the same) - go to check out and fill in your details in the SSL protected page (might need to change) - the information is sent to a payment gateway provider (will need to change) - order data is saved in the database (might need to change) - transaction information is recieved from the gateway provider and added to the order data stored in the database (will need to change) - receipt is emailed to client and sales team and displayed on the screen (might need to change) I would very much prefer if you simply change the payment gateway processing page ONLY leaving all the other pages and variables intact to minimize the impact on the application and the back end administration center. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform asp vbscript