What you're doing is extending what Gossamer Links was designed to do (which usually can be done easily, but not so in this case). Very few people have a use for such functionality, so essentially what you're asking is for us to change the current structure of the payment system for you, when you can get around this limitation by modifing your payment templates. If this were a simple change, I would do it, but it's a somewhat complicated one that would require quite a lot of changes to be made.

Adrian