So I have RB on PS2 and I have 2 questions about the 3rd party guitars. 1st are any of them compatible with the PS2 version? If so could I go out and buy a PS3 and RB (for PS3), and got the converters, could I use those controllers to play on RB(for PS3)? I know i could just buy the ones for the PS3 but there are alot more guitars to choose from on PS2 list.