How did they do that :: loadMovie, swapDepth?

Hello All, I’m pretty new to Flash (MX04). I have been trying to recreate the rollOver swapdepth effect (above). Works OK but slow using mc’s on the main timeline using the swapDepth behaviors. It appears (on the that each swf is loaded independently on top of the main with their own preloaders. This seems vastly more complicated than just swapping depths on a single timeline. Is it something that is possible for a sophmore action scripter? Im good with preloaders, loadMovie levels. A gentle shove in the right (swapDepth) direction would …GREAT. Thanx