My site is a drupal site and i have set up an account with clickbank. Whats the best way to have the ebook automatically delivered when the customer pays for it? At the moment, i'm having to deliver it manually myself by email which takes up to 12 hours (because i'm not online all the time). And due to clickbanks TOS i have to display how long it will take to deliver the ebook on my sales page. So naturally it can't be doing my sales much good if i'm having to tell the customer before they buy the ebook that it's be 12 hours before they get it. I know there's a clickbank module in drupal but this sets up a role where the customer is issued login details to download the book. I want them to be able to download it automatically off the "thank you" page on my site once they've paid on clickbank. I naturally want to make the process as straight forward for the customer as possible. Any ideas?