Has anyone determined how to sucessfully integrate the recurring billing options of 2checkout with Perlbill?

The instructions indicate that it will work fine for one-time transactions, but for a hosting company that would become quite inconvenient, always requiring clients to resubmit billing details on a monthly basis.

I was thinking that I could pass the {service} variable via the form to 2checkout, but that variable isn't parsing on the register_success page for some reason.

I just can't seem to find a way to make it work, everything I try gives a parameter error from 2checkout... I'd really hate to have purchased this only to find out (after being told I could do repeat billing) that such a simple and vital billing option isn't available. Requiring clients to manually complete the 2checkout forms on a monthly basis is just not acceptable.