Recovering Windows license keys from within a LiveCD environment in Linux

The only LiveCD-style way I know of doing this would be using the Offline NT Password & Registry Editor, which you can boot into from a floppy or CD. Since the key is stored in the registry, this is the logical way to do it. As for the key's location, see this article.

"Hirens boot CD has a Mini Windows XP option with ProduKey built into it, which will let you point to an internal drive.

http://www.hirensbootcddotorg/download/"