[chrishajer]

Ahh. You want to extend the registration form then.

This plugins do something similar, maybe you could use one as a starting point?

https://bbpress.org/plugins/topic/bbsocialize/

https://bbpress.org/plugins/topic/gaming-codes/

https://bbpress.org/forums/topic/plugin-allow-additional-or-custom-profile-fields

Also, there has been some discussion recently in these forums of just how to do this, but I can’t find it right now.