Say you want the images that are not in focus to fade by having more transparency the further from focus they are. To be able to do that using WP-ImageFlow2, you have to modify the
wp-imageflow2/js/imageflowplus.js file. The code below is a snippet from that file with the added lines in boldface. If anyone has a suggestion of finding the max width of the in focus image, it would be appreciated. I made it work by guessing so width values.