Things You'll Need
Instructions
Sign in using your gamertag by pushing the "Guide" button on your Xbox 360 guitar peripheral (controller) and selecting the "Profile" option using the green fret button.
Play through the Career Mode and accumulate in-game money, which can be spent at the Guitar Hero 2 store. Go into the in-game store at the Start Menu and scroll through the list of available items. Find a song you would like to unlock and select it with the green fret button. All locked songs cost $550.
Enter this code at the Start Menu if you don't mind cheating to get the locked songs. Press the fret buttons in this order: "Blue, yellow, orange, red, yellow, orange, blue, yellow, blue, yellow, blue, yellow, blue, yellow, blue, yellow."