Quote from: Tasty Ham Games Forum - nacho101
I plugged my Beatles RB Guitar, Windows sensed it as a Game Controller, and here are some of the stuff you'll need to know to make it work:

Green = Button 4
Red = Button 1
Yellow = Button 2
Blue = Button 3
Orange = Button 5
Lifted up(Like for Overdrive/Star Power) = Button 6
Solo Buttons = Respective color button + Button 7
Strum = Hat 0 (-1 for neutral, 0 for down, and 18000(or something like that) for up)

I didn't check the Buttons for + or -.

www.users.on.net/~dfidge/joymapper/joymapper.html
You'll need that to make it work.

If you want to run Frets on Fire, I discovered that the F1-5 won't work properly with JoyMapper, so I used this for the Function keys: www.electracode.com/4/joy2key/JoyToKey%20English%20Version.htm

This is about 10x as awesome playing with a real fake guitar.

-NOTE
All this stuff was tested on Vista. I'm 99% sure that it works on XP, though.