Windows Vista and later have a way of reducing the SYSVOL bloat that happens with Group Policy in earlier versions of Windows. This occurred because ADM template files were copied to each GPO in SYSVOL whenever you created a GPO in earlier versions of Windows. With Windows Vista however, you can create a folder in your SYSVOL share and copy all your ADMX template files to this share, thus reducing the size of individual GPOs considerably. To do this, do the following:
1. Log on to your PDC Emulator, which may be running either Windows Server 2008 or Windows Server 2003.
2. Use Windows Explorer to open the %systemroot%\sysvol\policies folder and create a subfolder named PolicyDefinitions.
3. Run the following command from an elevated command prompt on a Windows Vista SP1 computer in order to copy the ADMX/ADML files from the Vista machine to the PolicyDefinitions folder:
xcopy %systemroot%\policydefinitions\* \\%logonserver%\sysvol\&userdnsdomain%\policies\PolicyDefinitions /s /y
4. Repeat step 3 from any admin workstations running Vista that have different language versions installed.