| It all depends on how this server will actually be used. If it’s purely a web server, do you really need to give many people access? Or just the (perhaps few) web developers, webmasters and the Admins. Additionally, as others have mentioned, for most there is no reason to give them system level access (ability to login whether locally or at the console). WebDAV, Samba, FTP, SSH (Using Putty on the Windows desktops) are viable options for user access, depending on requirements. Web based content management systems are also handy, if you have the time to set one up for your needs.
At my work place, I found the best solution was a combination of Samba and WebDAV, according to the needs of the developer. I’m progressively training my Boss how to Admin the box using Webmin. Once she’s mastered that, I’ll show her the commond line tools.
With a little work and RTM, you can use Samba to handle most of the access, authenticating the users with your current WinNT PDC.