Loading photo problem

Hi people who know lots more than me…

I have been working through tutorials on Kirupa and also a book to gain a few skills in Falsh. A project has been to deliver a photo site. I have used the load graphic behaviour for this site, loading into a holder that has an empty movie symbol. It works fine, but as I have both horizontal and vertical images, it is impossible to have both centrally framed in the holder.

If I put a second empty movie symbol, the photos overlay each other, as it is only one frame that I have used for the whole site.

Any ideas on how to set it up sothat the two shapes can be displayed centrally?