Thank you for the quick response! However, I'm not certain if you've understood my question. The Mario icons are already set up on the forums. However, for the Zelda style, I would like to use some different icons exclusively with the Zelda style. For example, when a user switches from a Mario style to the Zelda style (think of this as like switching from the colour Blue to the colour Red on an unaltered version of Supernova), I would like the mushrooms displayed in the example in my previous post (forum_unread.png) to be replaced by an image of, say, a rupee, like the one below.
However, I only want the rupee to be used in the Zelda style, not all of the styles within the Supernova style. So if the user switches to the Mario style from the Zelda style, the mushrooms return!
Sorry if I've not worded this right, I've never been great at getting my point across, heh.
Life could be simple.