<div class="1">
<div class="2">
</div>
<div class="3">
</div>
</div>

.1 { width: 100%; }
.2 { margin: 0 auto; background: url(images/yourimage.gif) no-repeat; width: 500px; }
.3 { margin-top: 10px; font-size: 12px; text-align: center; }

follow and modify.