Yeppie, drag and drop works fine if you can see the desktop. If you cannot, just grab the bar at the very top, click and move  the rosity window to the side and drag from there to desktop..this is the quickest way.  Easy as pie.  To drag and drop, move the rosity window to show the desktop. Left click on image and keep it down while you move the cursor to the desktop image. Then, release mouse and it is there.

Be sure to use the large image found by clicking the one in the forum..more to work with.

Some neat and very fun stuff on this one!  Thanks for the thread, Kort.