Yes - here is one of my images that I have used as background for one of the controls (does'nt show well here):
As you can see its a 3x1 widget. In the settings you choose your toogles, and under "Theme" you select "Background" and forward it to your image. Then you set "Transparency" to 100% and you disable "indicators", "dividers" and "Labels". There you go...
Ah great, will have to try it out, thanks
Cheers