input[name="module_shipping"] {
    display:none;
}
input[name="module_shipping"] + label span {
    display:inline-block;
    width:40px;
    height:40px;
    margin:-2px 10px 0 0;
    vertical-align:middle;
    background:url(/content/images/radio_shipping-payment_mode.png) left top no-repeat;
    cursor:pointer;
}
input[name="module_shipping"]:checked + label span {
    background:url(/content/images/radio_shipping-payment_mode.png) -40px top no-repeat;
}