Ping G2 Irons High Launch

Hi.I have just aquired a 5/4/3 high launch G2 Irons and i not sure how to play them ,any help would be appriciated,Im a 20 handicapper,normally ply my irons fron the middle of my stance,how should i address the ball with these irons to get the most out of them?i.e.where should the ball be ?my stance and posture ,swing etc.thanks in hopefull appriciation.
Fred