I was looking at the system requirements for Left 4 Dead today and it looks like my macbook can run L4D. I had a question though. I heard about something called Bootcamp on MACBOOK and that many people have used bootcamp to play L4D on macbooks. Can you switch between the MAC OS and Windows XP using bootcamp or is it permanent? Or is it better not to mess with it at all? I don't want to mess up my Macbook either. Is bootcamp easy to use?