Animated preloader, how is it done? [renamed]

[font=verdana, arial, helvetica][size=2]need a good answer or better yet an fla for MX. Basically if you go to any of these sites:

especially this one:
http://www.unfortunateeventsmovie.com/intro.html
(animated RASTER preloader)

http://troymovie.warnerbros.com/
(raster image in preloader)

http://avp-movie.com/
(large raster images in background)

and finally sincity movie website has a preloader between scenes that’s a raster gun and animated.

HOW do all these preloaders show up 1%-100% ??? when I put just a raster image in the background my preloader shows up at 40%+, and NO I don’t have any linkage or music/mp3 streaming and I even do it in a separate scene that will go to next scene when preloader is done.
would be great if someone could post a similar preloader to the unfortunateevents website - at least a raster that’s animated and shows the preloader going from 1-100…[/size][/font]