Image Gallery like this one

I found a tutorial for this image gallery but the coding is SO SLOPPY I just cant figure out what is going on. http://sergprotector.com/temp/expscroll.swf This is the example. I have the code too if you feel its worth taking a look at it. If anyone can point me in teh right direction it would be great. I know it’s a common code, but I have searched through the tutorials for almost an hour and that was the best I got. Thanks!