Xymarra

I think it will only use the default names, BlueIconBackground and RedIconBackground in all the buttons, no matter what name you give it in the ButtonDrawTemplate. I am pretty sure I tried to change it (way back when) because I wanted to use different background highlight images in the spell book and the buff window. Instead I had to design a single background button image that served double purpose.

I imagine the same will be true of the combat ability window buttons. If you want to design a new background, you will have to call it BlueIconBackground and live with that same background for buttons in your spell book and buff window.