Yes, you can set this up by adding a "notify_url" form input on the paypal form. Basically, you need to add the following into the include_payment_paypal.html template:
Code:
<input type="hidden" name="notify_url" value="http://
www.example.com/path/to/gforum.cgi">
A good place to add it is near the top, just under the line with <input type="hidden" name="business" ...>. Of course, replace the www.example.com/path/to/ with the appropriate value for your site.
This notify_url parameter overrides whatever IPN URL you have set for your PayPal account, so you can set the IPN URL to the other services on your site.
Jason Rhinelander
Gossamer Threads jason@gossamer-threads.com