@axios
You would need few changes in CSS:
body .item-photos .main-photo {width:100%;margin-bottom:8px;}
body .item-photos .thumbs {float:left;width:100%;overflow-x:auto;white-space:nowrap;}
body .item-photos .thumbs a {display:inline-block;margin:0 8px 8px 0;}
body .item-photos .thumbs img {max-height:80px;}