You could edit /etc/hostconfig and make the line that reads
DNSSERVER=-NO- to read
DNSSERVER=-YES- . Upon reboot named will be running at startup from then on.
From there you need to edit zone files and do general named configuration. The admin reference can be found
here .
Bindery may be able to help you with zone files if you don't like CLI editing.
If none of this is to your liking, you can give
DynDNS a shot. Free, at least for what I use it for........