Burnout Paradise Cheat: Company Cars
If you have at least an A level license and want to unlock cars with company skins on them, insert the following passwords at the in-game cheats menu.
Best Buy Car - BESTBUY
Circuit City Car - CIRCUITCITY
Gamestop Car - GAMESTOP
Wal-Mart Car - WALMART

Burnout Paradise Unlockable: Steel Wheels Car

To unlock the Steel Wheels car, head to the in-game cheats menu, where you can insert “Sponsor Codes”. Insert the following password to unlock the car: U84D 3Y8K FY8Y 58N6.

Burnout Paradise Unlockable: Licenses

To unlock the licenses listed on the left side below, win the corresponding number of events in the game listed on the right side.
A - 26
B - 16
Burnout Paradise - 45
C - 7
D - 2
Elite - 110