[Jeff]

You could modify the updateCar function to use the wiimote buttons to control the car. For example, you could replace:

#Use y position of joystick to compute forward car movement
forwardMovementAmount = viz.elapsed() * MOVE_SPEED * -joyPOS[1]
car.setPosition( [ 0, 0, forwardMovementAmount], viz.REL_LOCAL )

with:

if wiimote.isButtonDown(wii.BUTTON_UP):
	forwardMovementAmount = viz.elapsed() * MOVE_SPEED
	car.setPosition( [ 0, 0, forwardMovementAmount], viz.REL_LOCAL )