Click in/on a hotspot to make an image appear

Hi,

I have a panorama of the inside of a small auditorium for a local Japanese traditional dance; I've created a large hotspot that basically covers the stage and a small area in front of it, which is where professional dancers and audience members dance. The performers' area of the panorama is largely empty of people (just one Awa Odori female dancer in the wings). What I want to do--if possible--is allow users to click inside the hotspot to summon a PNG image of dancers and audience mingling. I had thought MouseDown would be good to show the image and MouseUp to again conceal it; however, I cannot figure out how to make an image appear.

At present I have a sprite track that places a white box (the size of the PNG image(s)) right in the middle of the QTVR window, its location fixed to the window, not the viewing angle. I thought I could have the sprite invisible then, on MouseDown inside the hotspot, make the sprite visible and make it show its image. Apparently, I thought wrong.

Leaving the sprite visible, as a white box, if I scroll around inside the QTVR, eventually I reach a point where the sprite's first image appears, distorting as if it were part of the QTVR track itself. Thus the white box glides over the PNG, as if the sprite were binoculars scanning a scene. My guess is that the sprite's image has a reference point location of 20,20, which is being interpreted as 20,20 of the equirectangular image of the QTVR track. But I don't know.

I've also tried to post this same request at the Yahoo! QT group, because I'm in dire need of aid!

Thank you heartily in advance.