What codes can be entered to unlock cars in Burnout Paradise?

Additional cars can be unlock in by entering the codes below in "Under the hood" in the main menu of Burnout Paradise.
The following codes only works in the US:
  • WALMART - unlocks Wal-Mart Racer
  • BESTBUY - unlocks Hunter Bestbuy Oval Champ
  • CIRCUITCITY - unlocks HotRod (name of car not known yet)
  • GAMESTOP - unlocks Kitano GameStop Sport

Codes that work in Europe:

  • Z891 4K88 IN25 79AA - unlocks Steel Wheels
  • B179 8M20 XA09 80FF - unlocks Kitano GameStop Sport

In France Micromania have a car, to unlock it enter this code:
H211 1Z99 LZ00 00BB