Windows Lock Screen Image

I'm sure we've all changed our PC's background at one time or another to a picture of our children, our motorcycle or a dreamy beach.  But did you know you can, with a little registry hack, change the lock screen's image?  I figure something scary would be appropriate to chase off anyone who thinks they might want to mess with my system.  I've done snakes and spiders, but I think this one is the scariest to date.  Complete directions can be found at this link.

http://www.askvg.com/windows-7-supports-login-screen-customization-without-3rd-party-software-how-to-instructions-inside/