LeMans 24 Hours

All cars and tracks:
Enter TATOO as a name to unlock all cars and tracks in quick
race mode.

1999 Audi Prototype:
Enter MAYOU as a name. A race will immediately begin.
Complete that race and the car can be driven on other tracks.

1999 Toyota:
Enter PINOU as a name. A race will immediately begin.
Complete that race and the car can be driven on other tracks.

1999 BMW:
Enter POHLIN as a name. A race will immediately begin.
Complete that race and the car can be driven on other tracks.
(Information from Cheat Machine)