Instructions
Download and install the Xbox controller software from the link in the resources section.
Plug the USB plug on the guitar into a USB port on the computer. If the computer does not recognize the controller immediately, check the settings in the game controllers menu of the Windows control panel. Enable the guitar as an input device. Download any updated drivers that Windows finds.
Start Guitar Hero 3 and check the settings menu to configure the guitar. Control settings can be changed manually in this menu.