Finders Contextual Open With Menus

I have looked but not found anything so I am hoping someone has some info for me. Once I have installed CS3 Photoshop I have noticed I have two Operas in the open with option in finder. On top of that there are many other apps in the list that I might want to remove. How can I manage this list of apps in the list? I want to keep it short and what I use. Not every opt out there.

Any help will be great.
Roger