When you install Vista Service Pack 1 the old GPMC.MSC control panel is removed. The reason for this is that there is a new and improved Group Policy management tool released in the Remote Server Administration Tool kit that was released slightly after Service Pack 1 was released to the public.
One of the new features of the new Group Policy management tool is that you can filter policy settings. Directly under “Administrative templates” for both Computer and User Configuration there is a new “All settings” category which lists all settings in “Administrative templates”. If you select “All settings” you might then right click anywhere and choose “Filter options”. It looks like the screenshot below.
By entering the information you are looking for it is very easy to find the group policy settings that you are looking for. This is becoming more and more necessary as the number of policies grows by hundreds or nearly a thousand for every new Windows version released and it is hard to find the setting one is looking for.