That's BS! I've installed several sets of these cams and used the wedge. it gets stuffed down into the cover and wedges the both sides of the chain outward and just plain locks it in place. After that, you just remove the cam and sprocket. Of course, you do have to mark the chain and sprocket so that you get that back together in the same way it came off. PM me if you need any tools.
And as far as phasers go, I believe the Livernois ones are spring loaded which keep them quiet compared to others.