Just a quick note to share a great site that I stumbled upon today (not sure how I hadn’t seen it sooner). It’s a Microsoft TechNet site up on their Scripting Center, that lists a bunch of user-provided PowerShell scripts for managing Group Policy, including a very cool script module for creating, modifying and deleting WMI filters–something that you couldn’t do before without a lot of work. Apparently it’s been up there for over a year–who knew!!!
Anyway, the page is here: http://gallery.technet.microsoft.com/scriptcenter/site/search?f%5B0%5D.Type=RootCategory&f%5B0%5D.Value=grouppolicy&pageIndex=1 and includes some 70 different scripts related to PoSh and Group Policy.