Begin a new game and at the entrance door, type the code "120763-090665". Hold the "CTRL" key and click on "OK". Push "CTRL" and "0" et choose to not save the game. Open one of you old savegame from this point, you can use one of the following Cheat Codes.

LOBBY
DRUM
HALL1
TAPESTRY
GARAGE
CHASM
DALI
ATTIC
CELLAR
VRROOM
JUNGLE

After you type a Cheat Code push the "ENTER" key to validate and you''''ll be transported directly into an another area of the game.