Check out Terminal Services in the Add/Remove Programs (windows components) on your 2000 Server.
If there is a firewall between the 2 machines, you'll need to open port 3389.
On the 98 machine look for the Remote Desktop Client:
http://www.microsoft.com/windowsxp/p...rdclientdl.asp
Look into your administrative tools on the server to find Terminal Services Manager and other tools for configuring the Terminal Services.
Free, works *very* well, and you can use your NT logons to allow/deny logon access.