Change Car Color
Press pause during a race and select race stategy. Hold L1 + L2 + R1 + R2 + X + Circle + Select.
Master Options
Press pause during gameplay and select racing standings. Press Circle + X (You may have to press it more than once) An option screen should should appear. From here you can change the speed of your opponent, gas mileage, tire wear etc,,,,
Unlock Stock Cars
Begin a new carreer and at the register screen, enter you name as "Go Bears!" for Stock Cars
Unlock Formula One cars
Begin a new carreer and at the register screen, enter you name as "Go Bruins!" for Formula One Cars.