Interactive text sroller

Hi,
I,ve found multilpe ways to create a text scroller on this site. But I want to know if there is a way to create an AUTOMATIC one in flash (I mean a text that scrolls by its own with no scroll bars) just like the one you see when you press the about flash mx button in flash mx.
I know I could simply do it with key framing and tweened animation but the text of my presentation is very long and when imported in flash, though my pc has an AMD Athlon Xp 2800+ with 768 mb ddr ram, flash almost freezes and the swf movie exported is very heavy. That’s why I want to make it with action script.
Thank you, any help will be appreciated.

Thanks,
it really helped.

Any time

SHO