Full character attributes:
     Go  to the "Garage" screen in scenario mode and press Down, Down,
Up, Up, Right, Left, Right, Left, Select.

99,999,900 credits:
     Go  to  the  "Garage"  screen  in scenario mode and press Up, Up,
Down, Down, Left, Right, Left, Right, Select.

CPU control:
     Pause the game, press Select, then unpause the game. Now your car
will  be  controlled  by the CPU. Repeat this code to return to normal
control.

CPU controls car with you in it:
     Press pause during the game, then press Select and choose the CPU
mode and then the CPU will control your car.