Well, yes it can seem complicated but it isn't as bad as it seems, first try to just make the page exactly as instructed on the demo page by downloading the the .js file and copying exactly the code in steps 1 and 2 and pasting it into a blank HTML page in the places indicated. Here is a blank page, if you need one:
Once you have the demo working, try replacing some of the images with your own (if you need more help with any of that, ask here in this thread).
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
Tables and other layout questions are really another matter. Once you get the script working, if you still need layout help, ask (start a new thread) in the HTML forum.