AD Can’t Find PDC, DNS Miss-hap?

Hey Guys, It's my first post here for some reason as I have read several articles on afp548 and found several good solutions on the forums but never posted so thought I'd sign up and give it a go! I have an existing Mac-only network with an OD Master. The OD Master is also a PDC (and a DNS Server for that network as its the only server on that network) and I am trying to create a BDC Win2003 server to which my windows clients can hang off, however; when I run dcpromo and try to join my 2k3 server to the domain it can't find it? Its says it queried the DNS and can't find the SRV record (which is fair enough as Mac doesn't have these silly DNS entries like Winblows does). So, how am I going to get my Win2k3 Server to find the domain? I have thought about entering the DNS entries by hand (like ldap._tcp.dc._msdcs.mydomain.tld) but there is a fair few and I don't think that's going to work, would I need a windows DNS server for this to work as they seem to file things differently (even though they give the same result of a forward/reverse lookup functionality for a network)? Any help would be greatly appreciated as I have never used OS X as a PDC before! Regards, r00tb00t