For example, here is our emoticon sprite:
http://static-assets.shivtr.com/images/sprite-emotes.png
You could then create your own sprite of a similar size with different emotes, and upload it somewhere, then add the following line of css to your site:
img.sprite_emotes {
background: url("http://path/to/your/sprite.png");
}
This would then use your own emotes in place of ours =)
