One thing while investigating this that I have noticed is that in the directory c:\WINNT\system32\dhcp (even on XP systems with the system folder of c:\WINDOWS). This directory is hidden, but contains quite a bit of the files that have been loaded. Included in this is a config file: winexplorer.dll. In this are some password hashes:
LocalSetupPassword=45244E5D5D024857420D585F
User1=admin|1|0
SignOn=C:\WINNT\system32\dhcp\ntlmconf.dll
User2=curry|1|0
[USER=curry|1]
Password=qa0F1DD1B0149057FE700DFCC8330DAAEA
[USER=admin|1]
Password=4C2F4F4D540E5956435A15
I'm not positive which hash functions (obviously something in Hex, MD4, salted MD5?) these are in, but it would be worth taking a look at.