WP-e-commerce is a great plugin . I need to implement helcim payment gateway with wp-e-commerce which is not available in latest version . could any body please tell me how these merchant files(wp-e-commerce/wpsc-merchant/helcim.php or authorize.php or paypal.php) manage to do work with whole wp-e-commerce . I was able to manage everything except one thing that is my helcim.php page is unable to insert values in 2 tables out of 4 tables but when I use authorize.php then all the four database tables gets updated with new entries . Do I need to integrate my helcim.php page with wp-e-commerce's functionality but how ?? What would be the best and error free steps one should follow while doing modifications ?