Script to lockdown HKCU key

Is there a script I can run to restrict permissions on a registry key in HKCU. I need to restrict the permissions to read only for our users for this key:

HKCU\Software\Policies\Microsoft\Office\11.0\ Outlook\Options\Mail

If I use Office admin templates for this key in Office it locks down other options we do not want locked down. Appreciate any help.

Thanks