How do I install plug-ins to Group Policy Preferences to manage Applications?

We are running a Windows 2008 Domain in our organization.  One of the new features of Group Policy is the Group Policy Preferences.  Under preferences, there is the ability to map drives, add shortcuts, etc.  The part we are having trouble with is the Application Policies.  By default, they are blank (Microsoft, because of regulations, could not put the policy paks in place to manage Microsoft Office).  We would like to take advantage of these paks, as well as any other policy paks that are out there for application configuration.  My question is, where do I find them and how do I install them?  I must be searching for the wrong thing, because Google hasn't given me anything yet.

To sum up:
1.  Where do I find the policy plugins to manage Microsoft Office?
2.  How do I install these policy plugins?
3.  Are there any more plugins out there?