To create a Group and a rollup for all your DNS servers like: DkCphDNS0xx you could create your own Management Pack like this walk through. The code used in the example is from Jonathan Almquist\s blogpost: http://blogs.technet.com/b/jonathanalmquist/archive/2010/04/28/how-to-create-a-computer-group-in-the-r2-authoring-console.aspx and in this example the code is like this: