How Do I Create Repeating Tiles that size according to screen?

Hi Guys

i was wondering can someone give me some clue or show me how to make a
tiled Background in flash that size according to browser ? I know there is a tutorial in kirupa that tell us how to make a repeating background … but i cant seem to get the thing to export propotionaly and whithout the main stage (main movie n not bg) stretching itself to fill the screen … so is there a way to create something similar to the link ?

Eg.http://www.enjoygreenergrass.com/main_site/main.html

Thanks ppl