Preloader for individual images

Hello everyone. I have been struggling with this for weeks…

I really would like to know how to have a preloader for individual images. I have learnt how to create a preloader. Here is one I made:

www.s3tup.com/3d.htm

I tried loading swf files into movie clips and I thought if the swf I was trying to load had a preloader it would show… but it didn’t. :worried:

What I am trying to learn is how to preload images individually like in this site:

www.polaralert.com/exhibition/top100/index.html

If anyone can point me in the right direction I would appreciate it.

Ollie.