WINS

I have two domains. Neither domain is using windows 2000 active directory. However, in domain XX I have NT servers and 98/95 machines that use a Windows NT 4.0 WINS server. In domain OO I have some Windows 2000 servers and some windows 2000 clients and I have a windows 2000 WINS server.

Question: How do I make the windows NT WINS server talk to the windows 2000 WINS server? (i.e. have them do a push/pull between each other?)