Pause the game during a race and type one of the following codes:
Additional systems at 99: liselotte
All cars: nalice
Infinite ammo in deathmatch mode: impact
Enable weapon mode in championship: overkill
Tuning phase 5 for all systems: likepamela
Free choice in starting league: clementine
Animated switches in menu: smccoy
Disable cheat mode: alloff