I think I need do quite a few modifications in several files...
What I need is that the 2 images will serve for "off" and "on" states of the widget,
and that the widget will remember all the time, the data of the 2 images.
I need also that the widget setup will enable it to function either as a "single image widget" (as currently),
or as a "on-off" widget (with 2 images)