Add iContact Integration To Custom Wishlist Member Registration Code

I recently purchased custom coding to simplify the post purchase experience for my Wishlist member site. Basically, when a customer purchases through Clickbank, whether they buy 1 item, 2 items, 3 or 4 in the transaction, they simply click any link on the Clickbank thank you page and they land in their account - already logged in, account already created and populated with their purchases. This is a vast improvement over the standard behavior of Wishlist Member, which requires extensive steps to register and log in multiple times to populate a customer's new account. There is ONE feature that isn't working yet - the iContact automated list signup. Normally, if a person registers to a membership level and an iContact list has been "integrated" with it, the new customer is automatically added to that mailing list. However, the function is not yet working with the new code - I need this working in order to use the solution they've developed. That is what this job is.