524336 Integrate Paypal Website Payments Pro with OSCommerce Site 2

We have a modified OSCommerce website which we would like to integrate with Paypal Website Payments Pro. The site is built on a version of OSCommerce that does not have a working version of Payments Pro integrated with it already. We wish to have the option of using the fully integrated API where the customer remains on our site throughout and also the option of sending the customer Paypal's site to complete the payment. Paypal Express should be integrated as a matter of course. The installation should integrate with our admin panel so order administration can be carried out purely from the admin site. You will have access to a development site with FTP and database access where you can make the necessary changes. Deliverables: - A fully working Paypal Website Payments Pro integration. - Clearly marked code indicating where any changes start and finish. - A list of all modified files and additional files so they can be integrated with our live site.