Guitar Hero 2 (PS2) Cheatzzzz

Codes

At the title menu, enter the code.

Cheat	Effect
Yellow, Yellow, Blue, Yellow, Yellow, Orange, Yellow, Yellow	Performance mode (Guitar God Mode?)
Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow	Hyper Speed De/Activate
Y,Y,B,O,Y,B	Air Guitar
O,Y,O,O,Y,O,Y,Y	Flaming Head
B,O,O,B,O,O,BO,O,B	Horse Head
B,O,Y,O,Y,O,B	Crowd has Eyeball Heads
O,B,Y,Y,O,B,Y,Y	Crowd has Monkey Heads
B,Y,O,R,O,Y,R,Y,R,Y,R,Y,R,Y	Unlock All (NTSC Version)

PAL Codes

At the title menu, enter the code. Enter again to de-activate.

Cheat	Effect
B, Y, O, B, Y, Y	Air guitar
Y, Y, O, Y, O, O, Y, O	Flaming Head
B, O, O, B, O, O, B, O, O, B, O, O, B, O, O, B, O	Horse Head
Y, O, B, O, Y, O, B, O	Hyper Speed
Y, Y, O, Y, Y, B, Y, Y	Performance Mode (no HUD)
Y, Y, B, O, Y, Y, B, O	Monkey Head Crowd
Y,O,B,O,B,O,Y	Crowd has Eyeball Heads

Hyperspeed on Dualshock

Just do the sequence on the main menu (while selecting "Career Mode"). And keep doing it repeatedly until a message appears. Don't do it too slow.

Cheat	Effect
Triangule, Square, X, Square, Triangule, Square, X, Square until a message appears	Activates the Hyperspeed