i've find a felfire warlock patch that modify fire warlock spell with green felfire anim&texture
now it replace normal warlock spell visual, but i need also old spell visual and new spell visual and i need to switch between these with an aura like
http://www.wowhead.com/item=43361 glyph of penguin
now i can duplicate the .m2 anim with hardcoded texture and add these to spellvisual.dbc but i don't know how to switch between normal and felfire effect (i didn't understand how
http://www.wowhead.com/spell=52648 aura works), can someone help me?