What about using javascript for this? There is this stuff I use on perlmonks (sorry I don't remember whom it comes from):

<script>
var headID = document.getElementsByTagName("head")`[0`];         
var cssNode = document.createElement('link');
cssNode.type = 'text/css';
cssNode.rel = 'stylesheet';
cssNode.href = 'http://datenzoo.de/pub/prettify.css';
cssNode.media = 'screen';
headID.appendChild(cssNode);
</script>
<script type="text/javascript" src="http://datenzoo.de/pub/prettify.js
+"></script>
<script>
prettyPrint();
</script>
[download]

It's really nice! Paste it in your perlmonks free nodelet to try it.