Pick the SECRETS option in the options menu. Submit the code one of the
following codes at the CODE ENTRY prompt. Finish the entry by selecting OK.
The cheats can be turned on by selecting them in the list and pushing Right.
CLRWTR - All weather
CFCKGL - Group B mode and Group B cars
AIDLAU - All other cars (including bonus cars)
BSDJUC - All tracks
HIQNRM - Expert mode
FUDWHC - All car parts
DMLPOD - All tests
EPDZJF - Mirror tracks