According to this site (http://blogs.msdn.com/b/dawate/archive/2008/02/05/building-a-3d-game-in-xna-from-scratch-free-video-tutorial-series-now-available.aspx), the Guitar Hero buttons map directly to the standard control on an Xbox 360 controller. Here's what it says (has a video and everything):

10). Determining What's What On The Guitar Controller The controller for Guitar Hero games maps directly to controls on a standard Xbox 360 controller, but It's not immediately obvious what exactly the whammy bar, strum bar, and orange button do. Rather than go hunt for documentation, we can find out by experimentation in less than 5 minutes.
Download WMV (4:45, 14.5 MB)

I haven't watched it, but I have seen other games that used a Guitar Hero controller in XNA. Good luck!

According to this site (http://blogs.msdn.com/b/dawate/archive/2008/02/05/building-a-3d-game-in-xna-from-scratch-free-video-tutorial-series-now-available.aspx), the Guitar Hero buttons map directly to the standard control on an Xbox 360 controller. Here's what it says (has a video and everything):

10). Determining What's What On The Guitar Controller The controller for Guitar Hero games maps directly to controls on a standard Xbox 360 controller, but It's not immediately obvious what exactly the whammy bar, strum bar, and orange button do. Rather than go hunt for documentation, we can find out by experimentation in less than 5 minutes.
Download WMV (4:45, 14.5 MB)

I haven't watched it, but I have seen other games that used a Guitar Hero controller in XNA. Good luck!

According to this site (http://blogs.msdn.com/b/dawate/archive/2008/02/05/building-a-3d-game-in-xna-from-scratch-free-video-tutorial-series-now-available.aspx), the Guitar Hero buttons map directly to the standard control on an Xbox 360 controller. Here's what it says (has a video and everything):

10. Determining What's What On The Guitar Controller
The controller for Guitar Hero games maps directly to controls on a standard Xbox 360 controller, but It's not immediately obvious what exactly the whammy bar, strum bar, and orange button do. Rather than go hunt for documentation, we can find out by experimentation in less than 5 minutes.  
Download WMV (4:45, 14.5 MB) 

I haven't watched it, but I have seen other games that used a Guitar Hero controller in XNA. Good luck!

According to this site (http://blogs.msdn.com/b/dawate/archive/2008/02/05/building-a-3d-game-in-xna-from-scratch-free-video-tutorial-series-now-available.aspx), the Guitar Hero buttons map directly to the standard control on an Xbox 360 controller. Here's what it says (has a video and everything):

10). Determining What's What On The Guitar Controller The controller for Guitar Hero games maps directly to controls on a standard Xbox 360 controller, but It's not immediately obvious what exactly the whammy bar, strum bar, and orange button do. Rather than go hunt for documentation, we can find out by experimentation in less than 5 minutes.
Download WMV (4:45, 14.5 MB)

I haven't watched it, but I have seen other games that used a Guitar Hero controller in XNA. Good luck!