CXML Punchout for OSCommerce Core

We have a heavily modified version of OSCommerce running on our site. Several of our customers use services and PO Companies that use CXML Punchout to navigate vendor sites and generate shopping carts and purcase requests. We need to support this methodology without heavily modifying our existing code. The new CXML code should "snap-in" with it's own modules / include statements except where absolutly necessary. The system must support the basics of CXML transactions including shopping, storing cart, changin the cart, approving the cart, and submitting the cart. A development server with test products and access to a CXML transactional service company will be provided. ## Deliverables Web browser compatability is not really an issue with this project as you are working strictly on transactional code using PHP and CXML. While we Use GoDaddy and will provide a Compatible Hosting account on GoDaddy, the solution must be universally compatibal with typical Linux and Windows hosting accounts. We will be migrating off GoDaddy in the future and do not want compatibility issues. The end programer should be familiar with OSCommerce best practices and expect to provide a solution that fits the OSCommerce programming model.