Button Icons

[JadeForlorn]

I apologize as I'm sure this has been answered but my search-fu is weak and I couldn't find it.

I am attempting to modify a group window mod I downloaded to make it more friendly for my inquisitor. I am hindered because I do not know where to find the names for the icons for certain abilities. For example:

I do not have Call of the Hero so I am trying to change this:
<Button BackgroundOpacity="0.000" LocalTooltip="Call of the Hero" Location="3,24" Name="ZCotH" OnPress="useability Call of the Hero target_previous" ScrollExtent="23,23" Size="23,23" Style="/ButtonStyles.invisible" />

to cast Favor of the Repentant, but would like to make the icon match that which is the spell.

<Button BackgroundOpacity="0.000" LocalTooltip="Favor of the Repentant" Location="3,24" Name="ZCotH" OnPress="useability Favor of the Repentant target_previous" ScrollExtent="23,23" Size="23,23" Style="/ButtonStyles.invisible" />

Is what I have so far, which I believe will work just fine even with the incorrect icon. Am I correct? Even so, if I am correct the inproper icon just doesn't work for me... I assume the icon name in this string is ZCotH, so how do I find the icon names for my other spells?

[Othesus]

Can you attach the file that you're working on? The button that you're modifying is invisible. There may be an image overlaying the button if you see an image there. The Name="ZCotH" is just the name of that button and it could be called almost anything though.