Preloader for XML slideshow

Hi, I have found quite a few tutorials that almost match what I’m looking for - but they are all set up differently. And since I already did this slideshow w/83 JPGS loading from an external folder & an XML doc listing all - I’d rather not redo at this point (if possible)

Basically what I’d like is a very basic preloader that will appear for every single image as they need it. I’ve never used preloaders before so I’m unknowledgable when it comes to them…

View the slideshow here: (just click on the “Canada 2007” red link towards the top to see the slideshow in a pop-up). http://inktrigue.com/dory/photogallery.html

I’m also attaching all my files (minus all the actual images) here to show how I have it set up… probably not the best way to do it, but I’ll be happy w/it if I can have the option of a preloader!! Thanks in advance for any help or links to other tutorials that might apply! Much appreciated.