Modify osCommerce for 1-step checkout process.

I need to modify osCommerce CMS to create 1-step checkout process. The functionality I am looking to implement needs to be almost exactly as on this website: [login to view URL] ## Deliverables 1. Fully functional osCommerce-based shopping cart and checkout process, almost exactly duplicating the functionality on this website: [login to view URL] Click on the button at the bottom of this page: [Try it now risk free] to see how quickly it moves customer to the final checkout. I need osCommerce to be adjusted to use the same procedure. I dont not need customer to be registered for checkouts as it will slowdown and discourage many customers. 2. Shopping cart must support checkout of physical products (with shipping and taxes) and downloadable digital products (PDF ebooks, ZIP files, etc...) via providing a custom time-limited download link upon purchase confirmation. I beleive oscommerce supports it. 3. If needed - I will provide internet hosting space for Coder and Coder will create a shopping/checkout demo that will demonstrate the required functionality separately for physical and for downloadable product. 4. I plan to use AutoresponsePlus-3 newsletter tool, that will require inserting a small predefined script into the shopping cart code page to trigger autoresponder logic. I will provide the script to the coder for insertion. 5. All modifications and additions done to oscommerce needs to be documented and I need to be able to reproduce them and utilize them in multiple websites. 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 Linux, Apache, MySQL hosting on [login to view URL] hosting provider