Sorry, we don't quite follow what you're trying to accomplish? Normally, if your product will issue a file download, you would simply upload that file to our server when adding the product in your E-junkie Seller Admin.
After the buyer finishes checkout and the payment processor (e.g., PayPal) confirms to our system that the buyer's payment was good and completed, we grant the buyer access to a thank-you page we generate, where we present their unique download link(s) automatically, and we also issue them a thank-you email with a link to reach the thank-you/download page in case they did not proceed to the download page after checkout.
