# 1, you need the serial number from the controller and the back of the cd case. Those numbers could still be registered to the original owner which is not good.
Being that is pretty much a discontinued product your best bet would be to get a hold of tech support:
There is no support for G2 any longer. The multiplayer feature will not work. Being registered to someone else is really a moot point. If you can get a copy of AddOns 5, it will update G2 to the last version. That's about all you can do.