Connect front-end design to back-end script

I have a front-end design that needs to be connected to a back-end php script. This is a membership/affiliate script that was previously coded for another program that I now want to use to run a new, simpler program. So here is what needs to be done: 1) Connect new frontend to existing backend, which would include making changes as necessary to points in the code, to make it work. I imagine that it will be more mapping than anything else. 2) Make changes in the existing pricing and upgrade structure and setup a new payment flow. Again, all of the code is already there, and the pages are already designed for the new payment flow. They need to be united with the script and work properly. I will pay a bonus for getting this done on time and working properly. Thanks. ## 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 All OS