Animated thumbnail loader for dynamic site

Hello, I'm looking for a thumbnail animation script for a dynamic website. Example of thumbnail animator can be seen on most major adult tube sites (like you porn) - Thumbnails are hosted on a cdn so must take account for http:// img src's - Thumbnail frames cannot be stored locally - Script must be compatitble with versions IE 7+ and firefox 2, Safari - The script needs to load the first frame when page loads and load others in the background not to hamper the page load performance - Script starts animating on mouseover and returns to frame 1 on mouseout - Frame delay must be configurable - Transition effects kept to simple image swapout - Script really needs to work fast and gracefully Need it fast so please get back to me with quotes. Cheers