How do I add an option to the AdminCP?

[gizmo4321]

Well, further research reveals that either it wasn't exactly what I needed, or I didn't fully understand it.

So, here's what I'm doing:

There are certain directories containing graphics (images/ranks, images/icons, to name two) that I need to be able to change according to the style the user has selected, because I want them to be anti-aliased into the background color. I've written a set of plugins that handle this for me, so all is good there. But I have to set the variables containing the style-specific paths by editing the plugin code.

What I'd like to be able to do is to make these settings part of the stylevar array by adding some options to the Main Styles settings of the AdminCP Styles Editor. Is there a way for me to do this?