Numpad 1: Super Fan Status - press this option and then enter career mode.
You will find that your Fan Status increases and this will unlock
several things as well as unlock most cars.
Numpad 2: Unlock Opponents - press this option and you will be able move into
the different Opponent Episodes. Press BEFORE you enter career mode.
Numpad 3: Fan Points in Race - press during race and you will see that your
Fan Points in the race increase.
Numpad 4: Destruction Timer - press during the race and the timer will
freeze. This may work in other events.
Numpad 5: Destruction POints - press this during race and your points will
increase. This may work in other events.
Numpad 6: Unlimited Player Power Ups - PLAYER ONLY - press this key and
your power ups will have unlimited use.
Numpad 7: Carnage Mode - ALL CARS - press this key and all cars will
have unlimited power ups which carnage will ensue!