One of the main complaints about PS3's backward compatibility for PS2 games is the inability to use custom PS2 controllers like the DDR dance pads and the ...

Full Guitar Hero and Rockband Functionality for PS2 and PS3 – Starpex is compatible with both PS2 and PS3, and allows users to experience the full list of game play features in both Guitar Hero ...

While it's far from perfect, Pelican's PS2 to PS3 controller adapter remains, for now, the only way to play Guitar Hero on a PS3.