being able to play in the style of EVH helps out alot. I enjoy playing this song alot, but I don't have that certain distorted sound you're talking about. He more than likely used a marshall SLP100 head and a variac(reduces the plate voltage I think) to get his sound as this was recorded prior to the 5150 head. He could have also used a Soldano SLO head, but i'm really not sure. As for effects, I've never tried it, but using a slow and light phaser effect might help you get closer. But again, the main thing is being able to play with the same type of feel/style that he has.