Any tutorials for xml galleries with advanced loading?

I downloaded and am using kirupa’s flash gallery with xml. It works/looks great. but i’d like to have it behave a little differently.

i’ve seen sites where the thumbnails continue to change their alpha indicating they are loaded and loading while i’m viewing an image.

are there any tutorials/samples out there for that? i simply want to see how it would all work together. maybe having 10 thumbnails and an image using xml.

any ideas?