Cars with minds of there own
Stop a vehicle go up to the driver on the left hand side of the door and shot the driver until they move into the passenger side dead (The victon becomes confused with the vehicle) get in the vehicle drive off and then press triangle to dive out of the vehicle and the vehicle will stop and start driving back and forth or stop the vehicle and push it from the back.
(The driver most be in the left hand side)

Police troopers
Police troopers cannot follow you everywhere they need a path to follow.

Kidnap police
In game play get the cops attention & fight them without destroying the police cars until two get in one. Then enter the driver’s side & the police will not risk shooting you. But they will follow you until you’re off-road!

On the last level of the first chapter when you are on the back of a truck with the money destory the truck get off defend off the remaining gangsters go to the garage select any vehicle now the police are avalible but now what ever you do the police will ignore you even if you shoot them until the misson is complete (But don't mess round too much or the cache memory will overload and the PS2 will crash there is a limit of 5 vehicles and 5 interactive characters performing an action 20 pairs of other secondary characters & vehicles any more and the main memory starts compressing until you change the view the extra will disappear and take the stress away).

Indestructible Cars
Infinate Ammo
Infinate Nitro
Invincibility
Weak cop cars
Zero Cost
Body Snachers
Night Night
Shortest Day

Nighty-night (night time when actavated).......................................drive for 700 miles

The shortist day (days are short When actavated)..........................drive for 800 miles

Farout (drunk, the screen moves lik your drunk when actavated).....drive for 900 miles

Stars = rewards
10stars.......................................................................................150% health

25stars.......................................................................................more clip ammo

50stars.......................................................................................stronger cars, trucks, ect...

75stars.....................................................................................free upgrades

Now the stars I'm only about 90% sure that's true, but the mileage I'm 99% positivethat it is right.

Enjoy

GTA & driver games ROCK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
PEACE OUT AND HAVE FUN GAMEING

Pause the game go accross to settings to cheats and type in

IRONMAN - INVINCIBILITY
ROLLBAR - INDESTRUCTIBLE VEHICLES
CARSHOW - UNLOCK ALL THE VEHICLES IN THE ERA
TOOLEDUP - FREE CUSTOMISATION ON VEHICLES
ZOOMZOOM - INFINATE NOS
GUNRANGE - ALL WEAPONS IN ERA
GUNBELT - INFINITE AMMO
KEYSTONE - WEAKER POLICE CARS

Hope these help you they helped me loads
As far as I know all of these cheats work
Ill post more stuff later on
GTA RULES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

You can enter this cheats by going to options and then to cheats.

Weaker Cops : KEYSTONE
Invincible : IRONMAN
Infinite Nitro : ZOOMZOOM
Infinite Ammo : GUNBELT
Zero Tune Cost : TOOLEDUP
Industructable Cars : ROLLBAR
All Vehicles : CARSHOW
All Weapons In Era : GUNRANGE

I hope this will help.