Unlock cars:
Enter iammostwanted at the starting screen to unlock all the cars.
Burger King Challenge:
Enter burgerking at the starting screen to unlock the Burger King Challenge.
Castrol Ford GT1:
Enter castrol at the starting screen to unlock the GT1.
Pontiac GTO:
Enter givemethegto at the starting screen to unlock the GTO.
Perfect Starts:
Watch your Tachometer when you're at the start line. When the needle turns blue, drop the clutch and hold on!
Nitrous Handling:
So, you're fishtailing and spinning out of those tough, high speed corners? Try hitting your nitrous on the way out of the turn, or anytime you lose control, and watch how fast you straighten out.
Change Career Mode Race Options:
To adjust the difficulty of any Career Mode race, simply go to the Main Menu and select Quick Race. Then, set up a race with your desired options on the same track as the Career mode race you're trying to win. Complete that race, then go back into Career Mode an do the corresponding race. All options (No traffic, No catch-up, Number of laps, etc.) will now apply to the Career race.