Just to end this sidebar- FF3 does not work on Windows 2000 or below. period.
The installer for FF3 GPFs in Win98 and ME, anyway; and Win95 reports that it is linked to a missing Shell32.dll export, SHBrowseForFolderW. (there are very few "W" functions on win9x, and those that do exist are stubs; the "W" stands for "Wide" and are unicode functions. NT is designed on Unicode; 9x is designed on ANSI. a "Dumpbin /imports" on my installed copy of FF3 reveals that it imports no ANSI functions where a Unicode equivalent exists. Therefore it will not run on windows 95 or 98 without some sort of emulation of these functions. UNICOWS does not provide adequate emulation of these routines to help in this instance.
My recommendation would be to try an older version; maybe even 1.5.