Guide lines and masking tougether?

Two problems, related to the preloader tween tutorial.

  1. How can I make the load bar move more smoothly, like with easing?
  2. Look at this sample:
    http://bohner.asdf.pl/masked.fla (MX’04)

It’s supposed to be a loadbar for this tutorial, but I don’t know how I can mask out the mask that is over the bar. Or smt like that :> I hope that you’ll understand.

thx.