Change NetBIOS name in 10.6 Server

I'm setting up a new server to replace my PowerMac G5 Leopard server, just got a Mac Pro so I put 10.6 server on there for file sharing services. I cannot figure how to change the NetBIOS name however. When i go into System Prefs and try to change it that way, it points me to Server Admin, but I can't figure out where to change it. It's currently at new-host.local, and I would like to change it to Lambda.local. How do I go about doing this? Thanks