Type in the codes while holding down the [Ctrl] key.

 MUCHMONEY   -   adds money
 ALLWEAPONS  -   all weapons and extras
 HELPME      -   repair pack
 AGGRESSOR   -   infinite weapons and extras
 BOOSTER     -   additional acceleration
 SUCKER      -   sucker is activated
 ALLOFF      -   all cheats OFF
 WRECKED     -   fast wrecks