Well if the model doesnt show up, then you havent changed all you need to change (btw I think there is a model on hive with a shockwave of air). You will have to change ability model, effect model (if it have any (you need to change the model for the effect specific, remember to use copy & paste if you also want the normal shockwave in the map. Then change the effect used by the ability to the effect you just made by CnP)). Same system goes for Buff if the ability uses any.
Sorry for late answear. Have been on vacation.
(btw: same reson I am reviving this tread - Although I wont count it as reviving as the question wasnt answeared. )