I had a friend at school who was able to run his MBP on his big TV with a wireless keyboard/mouse setup while keeping the laptop closed next to the tv (or other external monitor). First off, how do you do that without having the computer sleep on you...and second, someone told me that because of the heat coming off the laptop, it could damage the screen if you had it closed like that. How do you do the first? And is the second true? Thanks!