Managing Trusted Sites through Group Policy Preferences

Hi

I am looking for a way to manage Trusted sites. I have tried adding them through GP Preferences but can quit get it to work. I have added the sites I need, to Trusted Sites, on the server I am managing group policies from, and tried to import them following the link I found. But the registry keys on the server, running Server 2008, isn't shown as they are in link.

http://www.energizedtech.com/2009/07/managing-trusted-zones-with-gr.html

Any ideas?