Loading external SWF - incorrect getBytesTotal?

Loading external SWF - incorrect getBytesTotal??
Hi, I’ve posted this question a couple times now, but no one has responded to my posts. I’m really desperate for help, so if any one had ideas please let me know!

I am loading external SWF into empty movie clips. I want to create a preloader that stops the movie until the SWF have loaded for all buttons

I want to do like this site [color=#22229c]http://minhlong.com[/color]

Thanks for your help!!