How do you activate cheats on Need for Speed Most Wanted?

There is a Burger King Challenge on the PC. You can get the Burger King Challenge by entering "burgerking" at the "Click to Start" screen. Castrol is the owner of the Ford GT. At the "Click to Start" screen, enter "castrol" to unlocked the Castrol Ford GT. Straight Drivin' Re- Random Pink Slip. Spike Strips should be rolled over.