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.