Oscommerce Payment Gateway

Interested in someone creating a custom payment module for Oscommerce to interface with [login to view URL], which uses proxypay3 as its system. There is a specification file that explains the method, at the systems manufacturer site, = [login to view URL] Please make sure you read the specifications file and send a personal message that shows to me that you have understood what the project is, as I have had some issues in regards to this. As I have already delayed and spent money with this project my budget is fairly limited, while the range of the budget via the system is between 100 and 500, I cant pay more than 200.