Multiple preloader question

Help!!!
I have a question … I hope someone knows an anwer.
This is the website where it’s all about: http://www.markgoessens.nl/studiopress

You see, when you click on a button, there is a short moment with a white screen. The animation starts not directly after pushing the button.
I have 5 external swf files. 1 swf file is the menu with the buttons…the other swf files are the pages to: studio, portfolio, niveau and contact.

So, it would be nice if there is a preloader which loads all the swf files at the beginning BEFORE the menu starts. A multiple preloader. I found a couple of preloaders: http://www.bokelberg.de/actionscript but then he loads all the swf files and play them at the same time. I tried to place stop actions, but that doesn’t work.

Maybe I place the stop actions at the wrong place?
Or maybe someone knows what I have to do…is there a fla file or something?

Thanks.

ps. I also tried to make 1 swf instead of 5 swf files, but then I have to rename all my graphics and movieclips. So it’s to late for that.