Here are some cheats and tips for the game XGRA.
All tracks:
Enter WIBBLE as a code at the cheat screen. A sound will
confirm correct code entry.
Unlock racing levels:
Enter FREEPLAY as a code at the cheat screen. A sound will
confirm correct code entry.
O2 Liveried:
Enter UCANDO as a code at the cheat screen. A sound will
confirm correct code entry.
Programmer messages:
Enter MUNCHKIN, EDDROOLZ, or EDDIEPOO as a code at the cheat
screen. A sound will confirm correct code entry. A programmer
message will appear at the end of the credits sequence.