Target Art Files

I want to change the target art of Entangling Roots (Neutral Hostile 1) to Lightning Shield, but I don't want to mess with the <race>abilityfunc.txt file without knowing exactly what I need to do to change the stuff. The tuts aren't helping me, as I seem to have a short attention span. If anyone who knows about advanced ability editing can help me with what lines I am supposed to change to change the art, I would be most appreciative.

*echo*helloooo......... anybody out there..........*echo*