Tom, I did finally get this all setup and thanks a ton for this. I am still having some issues on certain instances not showing up. I'll dig more but wonder if you had similar issues.
Certain SQL2005 cluster instances are not showing up. Some are however so that is strange.
Also I have one named instance on SQL2000 that doesn't get caught. I'll start digging into the Registry keys tomorrow to see what's up but if you had run into this you might save me some time.
Update I have figured out that the Registry key that this article is pointing to is the default instance key for SQL Server. So on servers without a default instance (We have a few) this will not work. Still looking for other options and will post back when I find one.