Various cheats and hints
     Enter  the  following  cheats  at  the  Code  Entry screen in the
Secrets  option  section.  The  following codes need a master or bonus
code  which  will only work on certain discs. You may have to try more
than one.

Bonus Code 76538
Group B Mode and Cars: RTNITJ

Bonus Code 34674
All Bonus Cars: ZCNGMW
Expert Mode: IRZQNT
Mirror Tracks: FEQRJV
All Tracks: HCHSFD

Bonus Code ?
All Weather: CLRWTR
Group B Mode and Cars: CFCKGL or YFHPGW
All Bonus Cars: AIDLAU
All Tracks: BSDJUC
Expert Mode: HIQNRM
All Parts: FUDWHC
All Tests: DMLPOD
Mirror Tracks: EPDZJF

Unlockable Bonuses:
     Come  in first or second in the championship listed to unlock the
car or cheat.

Bonus - Championship 

All tests - Group B
Audi Quattro - Group B
Citroen 2CV - 2WD (Normal)
Expert Championship - 4WD (Advanced)
Extreme damage - 4WD (Advanced)
Ford RS200 - 4WD (Advanced)
Ford Transit Rally Van - 4WD (Advanced)
Lancia 037 - 2WD (Advanced)
Mirror mode - Group B
Mitsubishi Pajero - 2WD (Advanced)
Peugeot 206 - 4WD (Normal)
VW Golf - 2WD (Normal)