- Mount the image with your favourite application (i use Daemon Tools) or burn it to DVD (i.e. with Nero)
- Install as usual
- After installation completed, unpack the FixedExe.rar and copy the resulting file (GH3.exe) into your guitar hero installation directory, overwriting the original file (you can also rename the original file i.e. "GH3.exe.bak" before you copy the cracked one, avoiding overwriting)
- Play without restrictions (no more error messages, you won't even need to have your disc inserted or your image mounted)
FOR CUSTOM CONTENT :
- Just Unpack DATA.rar and copy the resulting directory (DATA) into your installation directory, overwriting the original one (you can also rename the original directory i.e. "DATA_1" before copying the new one, avoiding overwriting)
-Enjoy your new, full-functional, customized, pimped Guitar Hero 3 for PC
P.S. Never tried playing online, don't know if that would work. Just try it and don't blame me if it doesn't.....