Bring the carpet to a complete stop, press "i", then type "ratty". After that, pressing:-
Alt-F1 gives you all the spells.
Alt-F2 gives you more manna.
Alt-F6 heals you.
Alt-F7 kills all creatures.
Shift-C completes the level.
CARPET -level # to skip to level number #.
Some people have reported save game problems after saving a cheated game. Don't know if this applies to the above skipping. If not this would solve the problem of restoring a "career". You wouldn't have your weapons/spells though.
