Failure to create key WAD.

This issue happens whenever I attempt to start up XWE on a computer with limited user access, something like that. I can't possibly replicate the same thing right now, but something like that happens. I've fiddled with the INI file but it just won't work. It doesn't even ask me for the main WAD when starting up for the first time. It just gives me that error and doesn't work.

http://www.doomworld.com/vb/showthread.php?s=&threadid=34657&highlight=XWE.INI
This may help.

Or this:
http://www.doomworld.com/vb/search.php?action=showresults&searchid=245767&sortby=lastpost&sortorder=descending

This might be even better:
http://www.doomworld.com/vb/search.php?action=showresults&searchid=245770&sortby=lastpost&sortorder=descending