Software Order Processing Service?

[Marty Knapp]

In my search for order processing services, I came across a php script 
for use with PayPal. I didn't look too deep (don't know php), but for 
those interested you might take a peak:

<http://www.maxprog.com/site/scripts/paypal_ipn/index.html>

They have a free "lite" version and "Pro" version for $10. I don't know 
if/how they deal with registration codes.

FWIW,

Marty Knapp