Networking - Read in [; ; winNT4]

[Stu_16]

Ok, scenario time. Say if i was to set up a computer on windows NT 4 server, and dedicate it as a server for my network, how would i go about creating a domain so that people have to login with a unique username and password to gain access to certain resources on the network. A lot of businesses, schools and colleges use this type of set up, how would i go about doing it on my own network?

The other computers on the network will be running Windows 98 by the way.

Thanks,

Stuart.