I have guitar hero 2 and rock band, is it possible to play guitar hero 2 using both the guitar provided by guitar hero and the one provided by rock band?
If so, how?
I don't think GH will work with the RB guitar, though it will work the other way around. Because GH was made first (by Red Octane), they didn't have to worry about compatibility with other peripherals, and since RB came out later (Harmonix), they made the decision to be compatible so that you could use guitar controllers you already had.
I guess it can't hurt to try, but I don't think the RB Fender will work for GH. And like pp mentioned, if you're playing on the 360, you can plug in both USBs, but not sure if that'll work if you're on PS2.