I have created an application to modify the followinf key ( from value 0 to 3):

HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Internet Settings\Zones\3

Doing so the users can not download files from internet.
Is it possible to do this by GPO?

Moreover I'd like to block the users to save image or others files by selectiog "save As".
Is this possible by GPO or must I create an simple application?
Please,which is the registry that I must modify?

thanks for all