Simpsons, The - Hit and Run cheats and cheat codes for Playstation 2

Go to the option menu (at the living room), then hold L1 + R1 and 
press the following buttons. A horn will sound if you did it right. 

Invincibility: Press Triangle, X, Triangle, X.
Unlock bonus cars: Press X, Circle, X, Circle.
Display speedometer: Press Triangle, Triangle, Circle, Square. 
Red brick car: Press Circle, Circle, Triangle, Square.
Super jumps: Press Square, Square, Square, Triangle.
Blow up vehicles: Press Triangle, Triangle, Square, Square.
Grid view: Press Circle, X, Circle, Y. 
Alternate views: Press Circle, Circle, Circle, X.
Fast cars: Press Square, Square, Square, Square.
Faster cars: Press Triangle, Triangle, Triangle, Triangle.
Psychedelic view: Press Triangle, Circle, Triangle, Circle. 
Different credits audio: Press X, Square, Square, Triangle. 
Drunk Mode: Press Triangel, Circle, Triangel, Circle
Night Mode : Press X, X, X, X

Halloween theme
Modify the system date to October 31st

Thanksgiving theme
Modify the system date to the last thursday in November

New Year's theme
Modify the system date to January 1st

Christmas theme
Modify the system date to December 25th