Use the code CARSHOW. It'll appear in you garage under "Commercial".
You walk up to the door of the car that your going into and press triangle. And on wii you press the down arrow.
It is rated T for the wii and M for The ps2.
FINISH GAME [ANY VERSION WHATSOEVER] CHECK YOUR GARAGE IT IS CALLED THE 'NEGOTIATOR' YOU CAN'T FIRE SOMETHING LIKE A PISTOL FROM IT [OR ANY WEAPON YOU HAVE EG- SHOTGUN/RPG] INSTEAD IF YOU HAVE PS2...
Piso franco is spanish or smthing like that. It means Safe Hause. So...