CRUSIN USA
More Cars- At the car select screen, for to any of the three cars to the left. Hold down one of the view buttons and you'll be able to choose the bus, police car or four-wheel drive.
Sirens And Lights- To get the sirens and lights to work on the bus or police car, come first in a race or get a "Record New Time" with either the bus or police car. After entering your initials, moves the joystick to the bottom of the screen, then over to the left (keep the conveyor belt on the screen). Wait 30 seconds and a head will roll by saying "Man, I love this game.". Exit the screen and choose a new race. When it starts hit brake, brake, and accelerate close together. The sirens turn off if you slow down, but repeat the code and accelerate to make them work again.