Windows NT 4.0 Domain Login to samba server

[secret]

    I believe I read somewhere that samba can be a domain login server
to NT4.0, however this support is still in the experimental
stages(although it "does seem to work").

    However I can't seem to get NT4 SP1 to take my domain name(KDC) as a
valid domain because it complains that it "can't find primary domain
controller."... How do I get around this difficulty?  I imagine it'd
work fine if I could force it to take KDC as the domain.

--David