There have been a number of posts here about various ways to preload images or build dynamic slideshows with the javascript version of GSAP.
Please check out this tutorial by Michael from nightlycoding.com. He did an excellent job:
http://nightlycoding.com/index.php/2012/09/image-slideshow-with-preloadjs-jquery-and-tweenmax/
Keep an eye on him. He has a number of GreenSock tutorials.
Very cool.
Carl
---