Important Cheats

invulnerable = BAGUVIX

Healthpoints, Amor, 250000$ = HESOYAM

All weapons group 1 = LXGIWYL

All weapons group 2 = KJKSZPJ

All weapons group 3 = UZUMYMW

Unlimitedly ammunition = FULLCLIP

No Police = ASNAEB

6 Stars = LJSPQK

Carcheats

Hydra fight jet = JUMPJET

Rhino-Gater = AIWPRTON

Monstertruck = MONSTERMASH

Jetpack = ROCKETMAN

Hunter Gunship = OHDUDE

You find more - but in german- on:

http://www.mogelpower.de/cheats/Grand-Theft-Auto_PC_27991.html