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Playstation 2 - Guitar Freaks And DrumMania: Masterpiece Silver cheats

Guitar Freaks: 

R = Red
G = Green
B = Blue 
P = Pick

Unlock Play Style menu:
Hold Start after selecting a song at the music selection screen. 

Unlock Extreme difficulty:
Hold G and press P, P at the music selection screen. 

Toggle Bass and Open P guitar modes: 
Press P, G, G, P at the music selection screen.

Increase note scroll speed:
Press G, G, G at the music selection screen. 

Deactivate all active codes:
Press P, P, P, P at the music selection screen. 

Unlock Sort music list:
Hold G and press Select at the music selection screen.