Wrap Image Around Curved Surface And Reposition It?

Okay thanks Dave! I finally followed your procedures correctly and was able to scale the image on the curved surface. Though, it has come in reversed from what was intended. How do I keep that from happening and/or fix it when it does? And, as you can see in the photo, I need to change the size of the curved billboard to get it to span 180 degrees of arc without tiling the image. I think I can figure that part out.