funny isnt it???
i wanted so much to be like Ed that i figured if i do everything like him i will sound like him. the truth is that it did work for a while, but then again how much do you want to sound like him and not have any identity whatsoever of yourself as a player.
i can actually do it with any kinda pick, its more a technique thing. But i also learned to do tremolo picking the good old fashioned Gary Moore way cause it helps with your alternate picking, at least i think so.