I think you have to remove the outer to get to the inner? so if you just need to do the outer boot all you should need to remove is the outer boot.
I'm not really sure why the bearings need to be messed with? I must be missing something key here....
Here is a shortcut on the DIY from Silver 5 that I am going to use:
http://www.xoutpost.com/x5-e53-forum/...t=boot+replace