The latest rage is creating chalkboard subway art and I recently shared a chalkboard background image in my Silhouette group. Several people asked how they can drag an image from a folder on their computer to their Silhouette Studio library.
The video below explains how this is done.
Note that you must have the Designer Edition of SS for this to work.
If you would like to have the background images I mentioned, join my Cutting Edge Deisgns group. The files are shared there in the Files section.