Tween - Update to AS

Hi everybody,

Look at the file to undestand what I want… those grapics are, in real, big jpg´s here in my project, they are the background.
The transition between then make a “slow motion” in the site! I think it is because I´m using tweening… there´s a actionscript code to do the same thing that I did in this file?

Thks,

Fernando