317395 osCommerce and 2Checkout

Project scope: Install the osCommerce script to my PHP host and port the payment processing module to my 2Checkout account. I don't know how flexible osCommerce is out of the box, but here's what I need: 1. User browses products and adds to cart. These are digital download products. 2. When customer checks out, they are redirected to 2Checkout to submit payment. Part of the checkout process involves creating a logon for my storefront. 3. After successful payment, customer is redirected back to my site where they can log in and access their downloads at will. Normally, the 2CO return URL would point to the download. But what I need ultimately is for my customers to have download access within my store, restricted to the products they have purchased. So if they log on to my storefront, they can download at any time at will. If they choose to add additional products they simply add new items to cart, complete the checkout process, and return to the storefront where they now have download access to the new products they have purchased, plus all of the previously purchased products. Furthermore, I need to be able to create accounts for customers manually that have full, unrestricted access to all available downloads in the store. Assumptions: * osCommerce is fully functional including CMS functions to add and update products, email notifications, etc. * Products that I add in my store will match products available within my 2Checkout account. I need to be able to add products at will, so I need to ensure the process works flawlessly both within the storefront and throughout the checkout process. I will need some instruction regarding required paramaters to port my shopping cart to any new products I add. Please, experienced only and no generic bids.