I have been trying to create a unique elite bow unit, and while I've been able to edit the basic arrow stats, I can not seem to effect changes to any special abilities (i.e. flaming arrows). I've edited the following files and everything seems to make logical sense

projectiles
unit_abilities
unit_special_abilities
unit_to_unit_abilities_junctions

I've also edited the .loc files for special abilities. I can get the game to load but for some reason the custom modified abilities does not actually appear as a selectable option.

Am I missing something?