Fantasy Drivers
Go to the Create-A-Car option and enter the following name: Extra Drivers

Unlock Dale Earnhardt
Go to the Create-A-Car option and enter the name: Dale Earnhardt. Exit Create-A-Car and you will receive a Dale Earnhardt Thunder Plate.

Unlock Paint Schemes
To unlock a paint scheme for a specific driver, win a race under Veteran or Legend mode.

Unlock Tiburon Track
To unlock the Tiburon Track you must have a game save of another 2003 title (such as NCAA Football 2003).

Unlock Night Tracks
In order to unlock a night track, make sure that this specific track has this option, then simply race on that track on Veteran or Legend and win the race.