3639 oscommerce payment module

adapt this google checkout payment gateway to oscommerce: [login to view URL] the script doo what I need, to process the order. what I need done is to take the order from oscommerce, the price the shipping and the taxes and to use this script to go to google and come back. when the order is completed it should update oscommerce database as paypal does. you can use this module as a reference to get the information you need to pass [login to view URL],4373/category,all/search,google+checkout to resume: the payment prcocess needs to be adapted into oscommerce, process the order and update all the tables that all the other payment methods updates, as the order table , status etc.. I don't think is hard as this module goes to gogole and then confirms and updates a mysql table. please show you work and make a competitive bid. Its important that the whole code is compatible with php5, I doubt it will be a problem as the part that needs to be compatible is already done. but for me to release the escrow money, it has to work with php5 on my server.