> Works great, except...it launches a modal form, and while the modal is up, the picture disappears (and Zorder doesn't seem to affect it), I guess because the toolbar can't get focus, until the modal is closed.

I had to do something similar, except that I went with an invisible button in the container on top of the label and image. I don't have this problem and the invisible button makes the whole thing look more like a normal button when it's clicked.