On the Novell login screen you will find a tickbox marked "Login to Workstation only" or something similar.
Ticking this box should allow you to get to the NT desktop. If you are logged in as Administrator you should be able to remove the Novell Networking client either from Add/Remove programs or the Network icon in Control Panel (I can't remember which it is in NT :-[)
Best of luck! Post back if you need further help