http://lunarmedia.com/blogs/lunarmedia_blog/archive/2008/10/04/paypal-integration.aspxHere are some valuable information about integrating with Paypal found in the support forum (thanks to PayPal_HarryX ): There are several ways PayPal returns payment data to you after the payment is completed. You get to choose how you get the data backenCommunityServer 2007 (Build: 20416.853)