My roommate has shoulder problems and trained West Side for 2 years and had to stop benching because of his shoulder, last time I heard he could bench 405 twice.
Long story short, he got a kettlebell and started doing what's on these videos and he says that he no longer has shoulder problems.
Now you can do these with a dumbbell and works pretty good. Just remember start out light.
http://www.youtube.com/watch?v=u5xQQMP8tj0
http://www.youtube.com/watch?v=nbabYc6HZw0&eurl=