[PHPBB] Register add to team

I was wondering if there was a way to set up the registration so that when someone creates an account, there will be a box that will ask them what they are to the team and there'll be choices like member, mentor, parent, alumni, or patron. Then depending on what they choice, they could instantly get a rank corresponding to their choice. For example, if a mentor picked the mentor choice, then they would instantly get the special rank "Mentor". Currently we'd have to go through each account and decide if it's a parent, mentor, alumni, etc. If there is a way, please help.

Pretty simple, either add a usergroup and depending on their choice upon registration they'll be automatically added, or.. just add another field to the registration.

As said above, you can either look for a mod for it, or look up basic / simple php and do it yourself since it sounds like a simple enough task.