From a Google search (which you should have done before posting your question) it appears that if you install IE9 on the computer where you have the GPMC installed (presumably your domain controllers) that the inetres.admx template will be updated with the IE9 settings.

How to Set GPO to Update Compatibility View List in IE9
In SQL Server 2005, is there a way to find users that either don't exist at the server level (an account that was deleted at server level but wasn't disassociated from databases before it was deleted) or accounts that aren't linked (an account may have been deleted at the server level but not db level, then readded but the db level was never cleaned up).

I've got a very messy server and it would be awesome if there was a query to run to find these.
