Can anybody tell me
Spoiler
what to do once you get the imp skin?
Have you tried this thread? not sure if the answer is here or not though, I didn't read through all the 3 pages but I kinda remember
Spoiler
that you have to wear the imp skin to escape through the furnace maybe?
http://americangirlscouts.org/bbc.com/yabb/index.php?topic=27252.0