FC2 server, WinME/XP workstations. How do I do authentication? The easier, the better.

[Apollo at Carmel Music & Entertainment]

So I have FC2 server for fileserv and MySQL. I need start having 
workstation log into the network (now they are just accessing shares and 
only MySQL has passowrd sitting in ODBC).
Problem is that I have 2 WindowsXP Home laptops (I think they lack 
Domain log on), and the rest of the workstations are WindowsME or 98SE.
What would be the easiest route to start making employees to log into 
the network? Also, is there a way to have systems log out at 9PM 
automaticly?
Thanks,
Apollo