Shoutbox

So can I use a single image with the 4 button states in it, or do I need a separate image for each state, and thats what the [ContentIndex=X] is for? I'm so noob at this lol

Basically I am trying to replace the current dull buttons (that are in the resources) with the shiney buttons that are also in the resources. I am not really making any new custom images, just exchanging one set of images for another set.