What tables and fields are required for registration?

[mistyPotato]

I am going to set up an automated registration process for my forum.

I have a customer database where I get their information from their purchase.

I want to automatically make them a member of my forum by generating a Username and Password (via a script) and then add the necessary information into any tables that are required to successfully make them registered without having to do any of it themselves.

I can generate the UN/PW and I already have all the data, I know how to use VB, Coldfusion. php etc so I can easily write an interface to actually put the data into the tables.

I just don't know WHICH tables in vBulletin MUST filled in to make a valid registration?

Thanks