In XP
C:\Documents and Settings\**Your Name or User or Some other**\Application Data\Mozilla\Profiles\default\**some number**.slt

Search for cookies.txt or prefs.js; all the settings are in there. But you'll have to manually edit prefs.js. The directory will be a new **some number**.slt and several lines of prefs.js must be changed to point to the new **some number**.slt. Be sure to close netscape, any systray netscape and backup prefs.js first.

There's a bunch of online stuff.
http://www.holgermetzger.de/pdl.html - Default Profile Directory Locations and Tips & Tricks