Choose the "Extra" option at the main menu, then choose the "Codes" selection. Enter "IMGOINGCRAZY" as a code.
Game Shark Codes
Master Code (Must Be On) 0E3C7DF2 1853E59EEE8EFC6E BCC3ACAA
Low Rally Time [Note] 0E2A4888 BCA95A82DE25A4DA BCA99B83
Acid Mode FE25A5DB BCA99B84
Classic Grand Theft Auto Rally Mode FE25A5DE BCA99B84
Upside Down Mode FE25A5D2 BCA99B84
Drive Underwater FE25A5DF BCA99B84
Flying Car In Relpay FE25A5D8 BCA99B84
Higher Max Speed FE25A5DD BCA99B84
No Car Shell FE25A5D9 BCA99B84
Note: Time will remain low unless you let off of the accelerator. If you drive off course or finish the race, release "accelerate" to continue.