Enter the following in the cheats menu under options. You must strum every note/chord. Note: The letters correspond to colored frets G-Green, R-Red, Y-Yellow, B-Blue, O-Orange

Code	Effect
O, B, O, Y, O, B, O, Y	Hyperspeed
RY, RB, RO, RB, RY, GB, RY RB	Performance Mode
GR, GR, GR, RY, RY, RB, RB, YB, YO, YO, GR, GR, GR, RY, RY, RB, RB, YB, YO, YO	Precision Mode
YO, RB, RO, GB, RY, YO, RY, RB, GY, GY, YB, YB, YO, YO, YB, Y, R, RY, R, Y, O	Unlock Everything