Keeping loaded SWF visible

Hello,

I have a problem that’s been bugging me for months, and would be hugely grateful for any assistance.

I’ve built my site using external SWFS. The problem is; I want to keep the loaded SWF viewable until the next requested file is ready. At present, as soon as a button is clicked the screen goes blank and the new file’s preloader kicks in. I’ve seen many Flash sites that avoid this problem, but I haven’t got a clue how it’s done. Can anyone shed some light?

Thanks in advance