how to hide users in windows 2000

I have had a look into this and I do not think it is possible.
Anyway, why do you want to hide accounts?

It's a half-assed way to do it, but i played around and it look like this works:

HKCL\CLSID\{5D6179C8-17EC-11D1-9AA9-00C04FD8FE93}

edit the permissions on that key accordingly. When you pull up computer management, you'll get an error, but it will pull it up ok just without the users and groups section.

that said, i really wouldn't recommend it since that wouldn't be the only way the users could see a username. if the account is used, a profile will be created(unless you use roaming profiles?)