Quick question: Paypal allows users to set up custom payment pages with different headers and other information. When you create a payment or donate button, you can select different payment pages to use for each button.
So far, I've been unable to figure out if it is possible to select a different custom payment page for the user to see when they are transferred to Paypal.
For example, I have multiple sites that I would like to receive payments on and I'd like to put the header logo for each site on the Paypal Payment Page. While I can create the custom payment pages, how do I tell eshop which page I'd like to use?