Trainer options
F1 - Active Trainer
F2 - Infinite Health
F3 - Infinite Ammo
F4 - No Reload
F5 - Infinite Water
F6 - Infinite Fuel
F7 - Infinite Scrap
F8 - Infinite Car Health
Notice:
After any cheat you don't need disable it to avoid crashes, Mostly car health cheat to watch out from, I didn't get any save problems but making a backup of your save is recommended.