Dave, maybe the OP means the preview pane also, not just the explorer backgrounds. As far as if there is a way, that would be no through sks on the preview pane.The right side,normally hidden portion.
As far as the explorer and the tiled image, you have to make a tile that can be laced together on all sides to use a small image,seamless look. To do just a gradient or such, tall or wide are better . Say 1pixel by 1 or 2 thousand pixels.Takes some practice to get what you want.Apologies if I misunderstood.
I wonder also if the lack of being able to change these ares is because it is considered hacking the code?Or some term..The reason I wonder is because people do change that to transparent and such, just not with sks. And, on that note, while making Urban Sound, every time I applied the skin after a change, I would get transparent images on that left side. wow it looked nice. Just a short term glitch I guess. But says its possible to me. Hmm, Stardock, please, with sugar on top.