Simple preference pane for changing all OS X desktop backgrounds at once to the same image.
You can download the Preference Pane already compile from here: http://www.welcometothedarksi.de/wp-content/uploads/2013/03/wALLpaper.prefPane.zip
For more information on how to use this Preference Pane go to: http://www.welcometothedarksi.de/2013/03/change-all-desktop-backgrounds-at-once-in-os-x/