LAN Setup with Win NT, Win98 and Win2000

At home, I have a Win NT Server4.0 and 2 win98 PC networked with a 10BaseT Hub and Netbeui. Now I tried to connect my Laptop to the LAN but haven’t had any luck. The laptop runs Windows2000 (w/ SP1) The problem starts with the domain name. At the logon screen of Win2000, I couldn’t type in the domain name. It only has a list of domain names to choose from. How do I enter my NT domain name? Do I need to install the Netbeui protocol on the Win2000 machine? Should I have to domains?
All machines have TCP/IP protocol installed.