Hi everyone! Just recently, I purchased the Guitar Hero III: Legends of Rock bundle for the Mac, and when I try to set up an online account, it asks me for a license. It looks a bit like this: Username: New Password: Repeat New Password: License: So, what exactly do I put there? I've tried putting the platform, serial number, and a few other things, but none of them work. Can someone please help, by explaining what I have to put there?? Thanks.