Is it possible to change the login background in OS X Lion? The gray sketchy desktop background looks faded and not sharp on my Macbook Pro when I log in. When my laptop goes to sleep and I have to login in again, the background instead is my desktop background and the login looks sharper, also the log-in box is on the top of the screen instead of the bottom (first login position). Looks better and resolution is sharper. Any way to change this? Much appreciated!