As far as simular scripts
Tony at Adult devil makes one here:
http://www.adultdevil.com/scripts/directory.shtml (and its on sale hehe)
XP has one here:
http://www.tgptools.com/scripts.html
Crystal makes one called Super Directory (Crysty at ICQ: 41313171)
I do not work for any of these people so if that is concidered spam please delete it ;-)
Shane