I have a simple buy now button with a few options underneath. All I need in my php or asp return page is the value of the drop down, then I can display the message that I want to. In the buy now form I have set the "rm" value to "2" (to switch from GET to POST) with the return url that I want. Can I request.form the os0, os1 etc values in my return page? Do I need to also turn on IPN or PDT? Or can I leave these off? Thank you.