Images as layers - custom coords
Well, who shall know whether it still works if not you ;)
I would say it works partially. But then I don't know how it is supposed to work exactly. Wiki markup is the most complex language I understand, if I see code I turn blind and to stone.
I didn't manage to find out how the values for the bounds in the layers relate to the coords on the map. I don't even know if there is some dependency at all. Which reduces this feature to merely display and image as a layer which can be zoomed and dragged around.
However, if you can give me a glimpse of how this should work I can try to add some more (and maybe even working) examples.