Double Health: When the movie before any of the game's levels is playing enter the following: Up, Up, Left, Left, Right, Right, Circle, Circle, Down. You should hear a brief moaning sound as a conformation that the code was correct.
Armored Car Weapon: Also in
the movie before any mission, enter the following: Up, Down, Left, Right,
Square, Triangle, and Circle. You now should have the armored car's
weapon on any car you get into.