I can't tell you how easy this project is. Seriously, my bloodhound could do it. This is also one of those things you can do to make yourself happy as a renter, but that won't piss your landlord off. After removing it, just keep the old light and put it back up before you move out.
LOVE THIS Cardboard DIY on Design for Mankind by Laura ! Great way to re-use all of your boxes after you move! You already bought those expensive boxes don't just toss them put them to use to create a home for your items. Do this before those items become the all too familiar clutter!