When I deployed a few ADMX files for Office 2007 I used this information below to store centrally:
Loading the ADMX templates
If you use ADMX and ADML files on computers that run Windows Vista, Windows 7, Windows Server 2008, or Windows Server 2008 R2, you can store them in one of the following locations:
If you want to manage multiple computers in your domain, create the central store in the Sysvol folder on the primary domain controller. This provides a replicated central storage location for domain Administrative Templates.
When you use a central store, GPMC reads the single set of Administrative Template files that are stored there when you edit, model, or report on a GPO. GPMC reads these files from over the network. Therefore,, you should always connect the GPMC to the closest domain controller. The central store consists of the following:
A root-level folder, which contains all language-neutral ADMX files. For example, create the root folder for the central store on your domain controller at this location:
Subfolders, which contain the language-specific ADML resource files. Create a subfolder of %systemroot%\sysvol\domain\policies\PolicyDefinitions for each language that you will use. For example, create a subfolder for United States English at this location:
For more information about how to store and use the Administrative Templates from a central store, see “Group Policy and Sysvol” in the Group Policy Planning and Deployment Guide (http://go.microsoft.com/fwlink/?LinkId=182208).
To store locally on a machine that requires the policy you can do this:
If you want to manage a single computer, store them in the PolicyDefinitions folder on the local computer. This enables you to edit the local GPO.
ADMX files are stored in this location: %systemroot%\PolicyDefinitions
ADML files are stored in this location: %systemroot%\PolicyDefinitions\<ll-cc>
where ll-cc represents the language identifier, such as en-us for English United States