vbulletin subscription validation

[ohadpartuck]

Hi,
I want to set up my site to allow users to pay fo VIP subscriptions.
I have done that.
But I also need to update other stuff in my DB concerning the user subscription (like other prevliges etc).
My question is where is VBulltin confirmation page('thank you for buying page') and can I write my own code there?

Thanks

--------------- Added [DATE]1341329826[/DATE] at [TIME]1341329826[/TIME] ---------------

and another question,
can I use the subsciption system to set up payment for other products in my site,
like movies and lessons.

Again- I need to set up immidiate access to the user once he's paid -> meaning that I need paypal's IPN (Instant Payment Notification)