Loading swfs in level "above", not numbered

I have about 10 external swfs that need to load upon the user clicking. While the clicked swf loads, I still want the user to see the level below during the loading movie. When the new swf is finished loading, the swf below can unload.

If I use numbered levels, then the 5th level will always be above and covering up the 3rd level and so on. Is there anyway to simply specify loading a swf “above” the previous swf? Then numbered levels won’t matter?

I would appreciate your help.
thanks