I think that everybody know how to use Cheats in GTA 4
these should all be entered on the cell phone afterthe first mission
Better weapons 486-555-0100
Car repair 2228-555-0122
Change weather 468-555-0100
Health 362-555-0100
Health, armor, ammo and weapons 482-555-0100
Helicopter - 359-555-0100
Invulnerability - 5483-555-9191
Jetmax 938-555-0100
Pedestrians riot 555-891-0011
Police boat 754-888-0100
Song information 948-555-0100
Spawn Annihilator Helicopter 359-555-0100
Spawn Cognoscenti Mafia Car 227-555-0142
Spawn Comet Car 227-555-0175
Spawn FIB Buffalo Car 227-555-0100
Spawn Jetmax Boat 938-555-0100
Spawn NRG900 Motorcycle 625-555-0100
Spawn Sanchez 625-555-0150
Spawn SuperGT 227-555-0168
Spawn Turismo Car 227-555-0147
Strippers Strip -468-555-0100
Wanted Level Down 267-555-0100
Wanted Level Up 267-555-0150
Weapons 486-555-0150
I think that everybody know how to use Cheats in GTA 4
haha use google to find the cheat that most easily to find.
Nice..........