You can also do this:
Find the following .exe's on your NT4 server and copy them to a folder on the win2k box.
eventvwr.exe (event viewer)
srvmgr.exe (server manager)
usrmgr.exe (user manager)
Now, create a 1 line .bat file for each of the nt4 machines that you want to.
c:\folder_with_exe\usrmag.exe \\10.10.10.10
where the 10.10.10.10 is the ip address for the NT4 machine that you want to bring up user manager for. You can subtitute srvmgr.exe or eventvwr.exe for usrmgr.
Last thing - you have to be logged on to the local machine with an account that has admin privledges on the remote machine. I'm ure that with a little palying around, you could add the user name and password to the command line.