Additional Pages in the Checkout Process

[harishl]

Well, it doesn't need to be simple per se, but is there a way to integrate the page without changing the core files? Adding it as a module isn't quite an option, as the client wants it to be an individual page.

Do you think you could explain the flow of the filesystem in the checkout process?

Thanks.

edit:/ By the way, it won't be a popup, it'll be an individual page (when you hit next it goes to ___).. if that changes anything.