DFGY     

 Enable all cars

AKJGQ    

 Get $6,000,000

NOEMIT    

Enable checkpoints again

OPIOP    

 Enable all challenges

ERDRTH   

 Enable all tracks

CVCVBM   

 Enable all quick tracks

QTFHYF   

 Enable shorter tracks

OPOIOP    

Disable all challenges

FFOEMIT  

 Disable checkpoints

RFGTR     

'Stop the Bomber' mode