Customize a new editor theme?

I wanted to create a new theme… basically to customize the colors the editor uses.

I added another css file to the others and changed the colors…
I edited “advanced-code-editor.php”…linking in my css file… entering my theme name into the function as a theme name, setting the theme changer.

Should that work? It comes into the interface dropdown and lets me select it, however, the styles don’t seem to be applying.. Just getting black text on white.

Am I far off? Would this require more than I’m thinking here?

thanks for your help. great plugin by the way- I can’t code inside of wp without it.

http://wordpress.org/extend/plugins/advanced-code-editor/