Unlockable
Black Elite Racer: Achieve ELITE Rank
Criterion GT Racer: Finish the White Mountian Challenge.
Custom Classic: Finish the Sunshine Keys Challenge.
Dominator Assassin: There must be a Burnout 3 gamesave on your memeory card.
EA GT Racer: Finish the Central Route Challenge.
Etnies Racer: Finish the Motor City Challenge.
Euro Classic LM: Finish the Eternal City Challenge.
Hot Rod: Finish the Lone Peak Challenge.
Logitech World Racer: Finish the Rank 10 Ultimate Revenge GP.
Low Rider: Finish the Angel Valley Challenge.
Nixon Special: Finish the Eastren Bay Challenge.
Revenge Racer: Finish 100% of the game.

Earn an AWSOME car easy
Just have a save game from Burnout 3: Takedown
n ull get a car that is fast n has a crashbreaker of 6!

Sick hints/cheats
Infinite Boost
When you are racing stay on the wrong side of the road. When you're on the wrong side, you'll see that your boost will fill up. When you hit it you won't loose any boost because what you'll gain is more than you loose

Shortcuts
when you're racing and you want to pass an opponent just look for the blue lights.
They are shortcuts

Payback time
If some one shunts you and he's still following you, just slam on the brakes then he'll crash into the back of your car and he'll go flying and you'll get the boost

How to beat the burning laps
The only way to pass the stage is to pass shortcuts but not all of them

Hidden cars
When you're in the middle of a race, all of a sudden you might see a cool car pass by you or come close. Usually if it turns out to be hidden car and you take it down you unlock it.

Unlock every thing
When you are doing race type:xx,triangle,cilcle,xx

Unknown new auto
To get a new auto before you made a profile there must be a save from madden nfl 06 make a profile and you will get a new auto

Easy takedowns
During takedowns, try to pummel your opponent's car to the wall, fence of just go head on with a burst of nitro

Rank up
If you don't have enough stars to rank up.
Then this hint is useful.
1.Go to an event that has a ok,good or great rating.
2.Play it and then you will have a good chance to rank up.