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Sony PSP - Madden NFL 06 cheats

Unlock All Stadiums:
Select My Madden option at the menu, and choose My Madden,
then go to Madden Cards and use 555128 as password.

Unlock All-Star team:
Go to main menu and hold L1 and press Circle, Square buttons.

Unlock Classic Teams:
Select My Madden option at the menu, and choose My Madden, 
then go to Madden Cards and use 614897 as password.