Ok....
We use a software called "Dream Account" to manage the billing and CC info... and we use vBulletin to run the discussion forums. At this point we do not have any software that will allow the two to communicate... When you go to enter your billing info please DO NOT expect Dream Account to know you are registered on vBulletin. The way it works is: You have to fill out a complete form with billing info, then at the bottom of that form it asks you "name on discussion boards" you have to enter you handle in that field... then the order goes into a box, one of our customer service reps will then go into that box and activate the account you registered.... We are paying a good amount of cash to have a program custom written for us... In the next month or so the whole system will be automated.