ddns on FreeBSD with bind9

[dave]

Hello,
    I've got a provider willing to do ddns. I've got a FreeBSD 5.3-RELEASE
machine with bind9 v9.22 i believe it is, and i'd like to do ddns with this
setup. I found a doc, which is linux specific at:

http://dag.wieers.com/howto/bits/bind-ddns.php

and i was wondering if there was an equivalent method for FreeBSD and bind?
I use isc dhcpd3 as well.
Thanks.
Dave.