Thumnail/button/preloader... help!

Hi all

I’m looking for information on how to create a particular navigation system. It’s similar to that of http://www.rui-camilo.de/main.html , where the nav system is made up of squares, each square shows a preloader for its’ respective jpg. Once the image is preloaded the square becomes a clickable button, that when clicked shows an image in an empty MC. Does any one know where I should start? I’m not really sure what it is I’m looking for. Are they preloaders with a button after the preloading is complete? I’m kinda confused. Can anyone clarify this for me?

I am using Flash MX with external jpgs that will be loaded into a empty MC. I have searched extensively but cannot seem to find any tutorials/assistance on how to do this. Any help would be great!

Thanks a bunch!:flower: