ok im not on my flash computer so i dont have the code.
i suggest downloading the ngs preloader for the code, if you want to customize it all you have to do is create a graphic and name it bar (in properties) then (im not sure what it is in the ngs preloader) but its something like PercentDone you create a dynamic textbox and give it that variable (it's not rounded, but it looks interesting with a million numbers) sorry i couldnt be of more help, will help when my other computer is working again.