How to Change Presence Plugin Icons

I use the presence plug in within our online Corporate Directory. It works great, but I don’t like the default MSN look-a-like icons. I’d rather use the circle icons which are in the presence plugin directory. How do I use them? Where is the plugin pulling the MSN icons from? I’ve tried replacing all the MSN icons with the circle icons and that didn’t work. Does anyone know how to change the icons?