Pimp My Ride

Enter the cheat codes in the main menu

Car Select
Up, Right, Left, Up, Up

Unlock Everything
Up,Right, Left, Left, Up

Pimp out Hari, Leon, and Alixs ride.

Pimp out Marias and Andreas ride.

Most of the time the kind of things in most need of pimping are usually body kits, paint jobs, and rims. Go for them first to get a better score.