Multi store and paypal IPN

[kriboy]

Hi, i have a store made with open source "prestashop". "http://www.store1.com
I want another store with "Virtuemart" but with a different url "http://www.store2.com

My problem is with Paypal IPN.

How to use paypal with store2 because paypal accept just one IPN  ?.
Can i change the script paypal in virtuemart ?

Sorry for my bad english language.