Courtney Cox is looking to save her career by going back to what she does best…getting laughs. Someone has to support her husband David Arquette . After that dismal cable show she did called “ Dirt” anything would be a step up. Well she is throwing her hat into the big leagues with a guest shot on “ Scrubs ”. Cox will be filling in for the not so beloved Dr. Kelso. J.D., Elliot and Co. ...