I am trying to create a file server either linux or xp based. I want this file server to be able to setup user permissions easily. Right now xp pro is being a B**** to me with permissions, so I am trying to find a really good GUI program for either Xp or linux. I want to make it to where users must login with a username and password to access shares with which they have permission to access. I would also want to make it to where some users must always enter a password and name to access. This file server must be able to share out to mac, pc, and linux.