We have NW 6.5 DNS/DHCP up and running and it works great.

A fly in the ointment:
One of our admins set up some Win2k boxes with the setting enabled for
registering the IP address with DNS. This works fine EXCEPT that
reverse lookup records are not created. Is this working as designed, or
is there a setting to allow reverse records to be created when a Win2k
workstation registers its address with DNS?