span.stars, span.stars span {
    display: block;
    background: url(../images/ratespritecheckbox.png) 0 -13px repeat-x;
    width: 65px; /* 5 stars x 13px - matches Reactive Resume's 0-5 level scale */
    height: 13px;
}

span.stars span {
    background-position: 0 0;
}