Thanks, Henry - Big help, and I have been able to accomplish pretty much what I needed.
After embedding the image I was able to trace over it as I wanted and can scale it to match the plotted area.
However, is there a way to place the image in the background of the plotted lines, which I had already drawn?
It seems I should be able to place the image on a layer and have that layer in the background, as with PhotoShop. However, I can't seem to organize the layers that way.