You probably noticed another folder listed near the bottom of GPMC, labeled Group Policy Modeling. This is another wizard-driven interface that allows you to configure some fictitious options and create a model of what might happen to a user and computer, should the options that you select during the wizard become true. Basically, you can use this wizard to pretend that you are making changes to a user, a computer, an OU membership, a group membership, and so on, and then take a look at all of the GPO settings that would be put into place in the event that you actually made these changes in production.
While this modeling wizard won't give you a perfect answer that you can 100% rely upon, it is an interesting feature. ...
