OES2sp2 running Domain Services for Windows

Is there a way to forward unknown local DNS items to a 3rd party DNS server. I am running DSfW and it has made special entries into the DNS server that is part of the install. The 3rd party DNS server is not controlled by me, but I am forced to use it, and they will not make the required DNS entries needed for DSfW. I would like to setup the DSfW DNS server to be the primary DNS server for all of the computers I control and forward all unknown local queries to the 3rd party DNS server. I know I can setup my DNS server as a secondary but won't this wipe out all of the custom information setup by the DSfW install?