You can also choose to save the image
to your windows directory. After the image is saved, install it on your desktop by
right clicking the desktop and choosing "Properties".
Mac Users (For MAC O/S 8.0): First choose the size of the image you want. After the image
has fully loaded in the window, click again on the image while holding down the mouse
button choosing "save image as" saving it to your desktop. Then after opening
the control panel "Desktop Pictures" click remove picture, then click select
picture, then return to your saved image and choose "position automatically.