Nascar Thunder 2003 Cheats

If your like me, you probably didn't name your created cars.
They're simply Car 1, Car 2, etc. To rename, go to modify, select
a car, and at the car menu, press triangle. It will ask if you if
want to save and select yes. Then at the save screen go to the car
with the same title as the car you are saving. DELETE IT!! Then go
back to the same space you just cleared, and save your car. Type
in its new name and enjoy being better organized.

Select the Thunder Challenge or Lightning Challenge at the game mode screen. Complete the various challenges to get new Thunder Plates. Note: The Plates are awarded randomly from game to game -- winning a certain track with a particular driver will not unlock the same Plate between games.

Use a memory card with a saved file from an EA Sports 2003 game.

Race any track on legend or veteran in the quick race mode and any track you race at, and if you win, you will unlock a new hidden track. The bonus tracks that you will unlock are the tracks behind the normal tracks that say locked, such as the Alabama 500 at Talledega, that is the night race. For example if you win Taledega you unlock the Alabama 500. This goes with every other track except Indianapolis speedway, New Hampshire and Bristol. These tracks do not have hidden tracks.

Use any memory card that has a saved game file from any EA Sports 2003 Game