Type these at the password screen:

Password - Effect

UKCLMNKT - Level 1 Stage 1
UAGWIQNE - Level 1 Stage 2
UAGWIJNA - Level 1 Stage 3
UANWIINE - Level 1 Stage 4
MUVMLGPC - Level 1 Stage 5
UKRLMTKV - Level 1 Stage 6
UAGWGINA - Level 1 Stage 7
UANWIQNZ - Level 1 Stage 8
UANWQVNA - Level 2 Stage 1
MUBWNENC - Level 2 Stage 2
UKRLNGKT - Level 2 Stage 3
UANWQONE - Level 2 Stage 4
UKCLNBKT - Level 2 Stage 5
MUBWNINC - Level 2 Stage 6
UKRLEHKT - Level 2 Stage 7
VANWQVNZ - Level 2 Stage 8