I had a customer ask me about this the other day, so i made a video... hope its helpful
[video=youtube;ZFahNJEkTGg]http://www.youtube.com/watch?feature=player_detailpage&v=ZFahNJEkTGg[/video]
[video=youtube;ZFahNJEkTGg]http://www.youtube.com/watch?feature=player_detailpage&v=ZFahNJEkTGg[/video]