Yeah. The whole wheel bearing is pressed in anyway so you're gonna have to remove the whole bearing carrier anyway unless you've got a better press than I did. Cause the actual hub is pressed into the inside of the bearing, while the outside of the bearing is pressed into the carrier from the outside. So these
http://www.realoem.com/bmw/showparts...31&hg=33&fg=40 press into part 7 of here
http://www.realoem.com/bmw/showparts...30&hg=33&fg=30
As for the alignment, yeah. It needed an alignment after that, but it wasn't that bad. You should do an alignment after any surgery on the car anyway. I did this a while ago, but if I remember correctly that's what I did. And you also have to disconnect the parking brake cable in order to remove the carrier from the car (that was actually the most difficult part for me)