Unlock All Create-a-Car Sponsors and Kitt Paint
Win the Winston Cup in Career Mode.
Unlock All Fantasy Drivers
Select the Features option on the main menu, then Create-a-Car. Enter the name "extra drivers"
Unlock Paint Skins
With the game level on Veteran or Legend, race any 1 player race.
Dale Earnhardt Bonus
Win the Daytona 500 in season mode driving Kevin Harvick's 29 car to unlock Dale Earnhardt. You will also get the Goodwrench car, Goodwrench Plus car, Wrangler car, Silver car, Coke car, Bass Pro Shops car, Oreo car, and the Legacy car.
EA Bio Extras
Reach Level 16 to unlock the All-Star Race.
Reach Level 18 to unlock the Bud Shootout.
Unlock All Cameos
Select the Features option on the main menu, then Create-a-Car. Enter the name "Seymore Cameos"