Found this nice article on tricep toning.
http://findarticles.com/p/articles/m...2/ai_104943677
One thing you might want to try is to get a trainer to help you with the move for the first time. They can watch your posture and form which are key in doing any freeweights - for safety and for maximum results. The gym I go to will give you a free one-time with a trainer so it might not hurt to ask if they do that at your place.