Preloading external swf

Hi, i been trying to make in my main movie a common preloader for all my external swf that includes a percent amount and a progress bar, but no result.
There is a tutorial here for preload dinamic files but it doesn’t have the percent amount and the progress bar.
If somebody knows a good way to preload all your external fies with just one preloder that shows a progress bar and the amount of data loaded, or some tutorial about it. Please tell me!
Thanks in advance!:slight_smile: