Stuck! Is this possible using Load on...

I've been working on this flash slide show thing here:


http://www.outofofficeautoreply.com/...ion/index.html



I want the content to come in after the preloader goes over
the

top of what came previously (see link). It's okay advancing
through

the portfolio pages as I can load on top of what came before
(and move

to the next frame of level0 with the next%26gt; button changing
to load onto

a higher layer and so on and so on). Here's the problem...



How can I go back successfully?



Any 'back content' will have to load above whatever level the
'next content'

has loaded onto. BUT this won't work they way I have done it



the swipe is done using a preloader script for the incoming
movie,

so I always need to load above...even when going back. It
would be

great if you could say ''unload what's below'' as sometimes it
doesn't

know what level is which...