Summary
Best practices for using Group Policy to manage Windows 7 computers include the following:
Install RSAT on your Windows 7 administrative workstations so you can use them to manage Group Policy.
After you edit GPOs using the GPMC included in Windows Server 2008 R2 or the GPMC included with RSAT for Windows 7, do not use earlier versions of either the GPMC or the Group Policy Management Editor to edit those GPOs any further.
Create a central store on domain controllers running Windows Server 2008 R2, Windows Server 2008, or Windows Server 2003 and copy the ADMX files from your computers running Windows 7 to this store.
Migrate your custom ADM files to ADMX format using ADMX Migrator. Do not migrate the default ADM files found on previous versions ...