64111 Payment Processor/Gateway IPN

I need to add a new payment source ([login to view URL]) for an already existing shopping cart script I use - cPcommerce. It is PHP-based and very similar to oscommerce. cpCommerce script can be downloaded at the link below: [login to view URL] Coding for several examples of currently integrated payment gateways can be downloaded at the link below: [login to view URL] Integration manual for MyVirtualCard API is attached, and is also at the link below: [login to view URL] My site is currently configured so that a user must registers for a account, enter payment info at time of checkout, and the file(s) they ordered are given access to them in their individual download area upon sucessful payment. Site uses MySQL database to store user info and other variables. Test mode from payment processor to simulate valid orders is available. PhpMyAdmin and cPanel installed on server. I've been looking through the coding for the currently supported gateway pages, and I don't think it would be that hard to modify one of the existing ones (probably Securepay or EPS) to be compatible with MVC.... but I don't have the time to go through the trial-and-error process to get it right. Because cpCommerce is open script, the gateway add-on must NOT be protected/encrypted in any way. Other users need to be able to read and modify it if required. Script changes will also be shared with rest of cpCommerce community, and designer will be given credit. My site also needs a few other MySQL and PHP modifications within the next month or so, so I am also looking for anyone with experience creating add-ons and doing tweaks for cpCommerce / oscommerce. I can pay via PayPal (I have a Confirmed and Verified PayPal Account) within 24 hours of successful script completion. Demo must be working before payment is issued. I also need at least 1 week of email support in case any errors/bugs are caused by the gateway. Thanks for your bid.