Placing an icon on user dsktop when its read only

Were looking at making none administrators desktop read-only but we want to be able to deploy icons to users desktops and not all users.

I've tried doing this as a user configuration but it fails with access denied. Is there a way of deploying an icon to a users desktop when that desktop is read-only to that user?

Stephen Fowles
3rd Line Support Technician
North West Ambulance Service - NHS Trust