this is the code for that:
[quote]/* Animated Main Photo */
div.imgblock200 {
background:url([b]gif URL[/b]);
background-position: center center;
background-repeat: no-repeat;
background-color: transparent;
border: transparent;
height:[b]200[/b]px;
width:[b]230[/b]px;
}
div.imgblock200 img {display:none !important}[/quote]
just edit the bold items; height, width & the URL of your gif file.
good luck