Type those codes in as player name:

 TROLLEY     - Toggles four wheel steering
 FORKLIFT    - Toggles rear wheel steering
 HELIUMNICK  - Makes copilot talk like Mickey Mouse
 MOREOOMPH   - Toggles turbo mode
 BLANCMANGE  - Toggles rubber car mode
 BACKSEAT    - Makes copilot become Nicky Grist
 PEASOUPER   - Toggles excessive fog
 OPENROADS   - Enables all tracks
 SHOEBOXES   - Enables all cars
 DIRECTORCUT - Camera position changes in replay
 BUTTONBASH  - Drive backwards
 GHOSTRIDER  - Less crashes
 SILKSMOOTH  - Fast graphics
 DIDDYCARS   - View from above
 WHITEBUNNY  - Steer on the right side
 MOONWALK    - Less gravitation