Hold X + Y at the options screen. Select the "Password" option that will appear. Enter one of the following case-sensitive passwords to unlock an additional course:
Enter CinqueValvole to unlock the Fiorano course. Enter LiebeFrauMilch to unlock the Nurburgring course. Enter Stars&Stripes to unlock the Laguna-Seca course. Enter KualaLumpur to unlock the Sepang course. Enter DaysofThunder to unlock the Atlanta course.
