In create-a-car mode enter the following as your name:
At the start of the game there are drivers with paint schemes are locked at the start of the game. Here's the way of unlocking those paint schemes for those drivers:
Under Features, you'll see Create-a-Car. Choose this option. When the new screen comes up, enter the first name Seymore and last name Cameos, then back out of the screen. You'll get a new Thunder Plate, and you'll be able to view all the EA Sports Cameos. The S and C must be capitalized, but the rest must be lower-case.