What happened to your hard drive?
I use the Guitar Hero Aerosmith guitar when I play Rock Band, my son has the Rock Band Fender guitar. The first guitars with Rock Band sucked, the strum bar was real mushy and our wa wa bar broke. The newer Rock Band 2 guitars are supposed to be better. There are 2 things you miss by not using a Rock Band guitar, the adjustable sound switch for when you go into overdrive it makes your guitar have different sounds and the hammer on fret keys near the body of the guitar for fast playing.
My hard drive wasn't acting right and I reformatted it. Works ok now, but I lost Some things like Hexic that I wanted back. Going to give the old one to my sister who only has a 20 GB drive. As far as the guitar goes I think mine is about shot. yellow button hardly works unless you really press hard on it. I just want a Mic and Drum Kit to be able to do that stuff.