z-index problems with NS6

Please help...

I am working on this prototype page:

Click Here to See Page (http://freespace.virgin.net/nathan.taylor/Demetri/index.html)

It looks as I want it to in IE5.5, but in NS6, (Forget NS4, I know it's horrid on that one!) the iframes automatically rise to the top, and the wandering bee sinks to the bottom.

Is there a way round this that anyone can help me with?

Many thanks

Sorry, the link on the page was broken, but it's functioning again!

I can see that this has been viewd a bunch of times, but not replied to. Does that mean that no one has been able to help? I'd really appreciate it, as I'm working on a deadline for this onw!

Many thanks