Leopard Server DNS

I've just purchased Leopard Server to run on a Mac Mini and am in the process of setting it up to replace a Windows DHCP/DNS server. Eventually I want it handle login accounts for both Macs and Windows computers completely replacing the Windows AD box. I got the 2 services running now per Apple's setup guide but upon testing discovered it does not perform Dynamic DNS. A search through google pointed me to a doc that was put up here in 2006 to configure it. "Combining DHCP and DNS" address: https://www.afp548.com/article.php?story=20060529143335323 Is this doc still valid? Its been 3 years now and I assume Apple's built-in packages would have changed by now.