tournament registration script

am looking for a script that our tournament can use to register players to the site but also give them a choice of 3 games and 2 teams to enlist for. if 2 games is to many just selection of the teams would be good enough. something like: username: ---------- Password: ---------- Confirm Password: ---------- Email address: ----------- Select Game: --------- Select Side: allies ------ : Axis -------- Submit. It would then register them to the site and assign them to a usergroup of the selected Team/Game. I would also require the ability to change members around if needed and edit any of their preferences. Also a Team/Game roster. would be a nice bonus but not essential. Thanks Graham