you obviously have a very limited view: if you're talking 10 or 20 machines, no problem. If you're talking 1000 or 2000 (or 10 or 20 thousand) then it's a whole different ballgame. Doing this would be career suicide. Imagine Monday morning, and half your upgrades cause people to have to change their way of doing things. Suddenly your HelpDesk is swamped. What do you tell your boss? Start off with a phased approach, IT first (the good IT people), then a couple of groups of power users. Allow them time to get aclimatized to it and you learn the sharp edges. Then gradually roll it out to the rest of your user population. Group policy is for changing all your backgrounds at once. But event then, you risk pissing off people in positions of power.