Instructions
Place the "Guitar Hero III" PlayStation 2 guitar in your hands.
Strum the following chords and buttons in sequence to add and unlock all songs on the system. Flick the strum bar located at the base of the guitar as you push each fret chord and button:
Yellow+Orange chord, Red+Blue Chord, Red+Orange chord, Green+Blue chord, Red+Yellow chord, Yellow+Orange chord, Red+Yellow Chord, Red+Blue Chord, Green+Yellow chord, Green+Yellow chord, Yellow+Blue chord, Yellow+Blue chord, Yellow+Orange chord, Yellow+Orange chord, Yellow+Blue chord, Yellow, Red, Red+Yellow Chord, Red, Yellow, Orange
Begin playing your new songs. The new songs appear in the list of available songs in "Guitar Hero III."