Loading External Files One at a Time

I have a thumbnail gallery with A LOT of thumbnails in it and the problem I’m having is that they all try to load right away when the page comes up (this is using the MovieClipLoader’s loadClip()) – or they load in groups. And tested on dialup things get really funky.

So I wanted to know if any knew how to basically have one external file load, then move to the next all the way down the line until all the thumbnails are loaded? Instead of making them all try to load at once.