The master file format is the same (if using standard primary). Convert
your master file so you can edit it and see with Notepad. Create your NT4.0
zone in the wizard. You can select to use an existing zone file. Point to
this file and it will import it. You can also just setup a secondary zone
on your nt4.0 server and xfr the zone over. When your ready, you can
promote the sec zone to a primary zone. Couple minutes and your done.
--wjs