Load a panorama in another window

I am trying to make a hotspot in one panorama load a panorama in another window. The 2 panoramas are both on the same stage with the upper panorama acting as the “index” for the lower one.
Naturally I have used target when embedding the panoramas (which require separate xml files) and hoped to use this when writing the code for the hotspot, but this does not appear to work. I have made this work by doing a complete reload of an index page using openurl(‘xx.html',_parent), but it looks bad with black windows and no merge. There appears to be no target available for load commands.
I have looked through the forums and can find no examples which do this. I experimented with parent / child and looked at vars and events, but have yet to find a good solution. The split screen example suggests I could use javascript, but this type of coding is beyond my abilities.
If anyone has any suggestions or examples that would be great !

To answer my own question Klaus replied in Feature Requests that this may only be possible using Javascript, as I had surmised. You can see the example at http://www.z360.com/what/index.htm