If you see the at the freewebs/huglover site, you can see that I was able to place a question mark on top of the picture. But, unfortunately there seem to be some problems with the inserted html, as I was not able to adjust the position the horizontal way. May be there was just a minor error?
The way I did it?
Well, I inserted some html-code. One div-tag with the big picture inside it, and the other div-tag with the image-button inside. Both have style with position:absolute, and a z-index. The top- and left- attributes normally adjust the position of the div-tag, but it was difficult in freewebs. It works out pretty well on the playsleuth map page.