Depending on how you play, choose the format that fits your setup: CHD (Compressed Hunks of Data):
Released in 2006, Guitar Hero II remains a fan favorite due to its precise engine and challenging gameplay. Guitar Hero II (game only) PlayStation 2 Review - Guitar Hero 2 Ps2 Iso Highly Compressed
For those interested in reliving the Guitar Hero II experience on their PS2, a highly compressed ISO file can be a convenient way to play the game. The ISO file can be downloaded and burned onto a DVD or played using a PS2 emulator on a computer. Depending on how you play, choose the format
For Guitar Hero 2 specifically , search for: Depending on how you play