Help! So, I have more media than internal hd space and I want to extend my iTunes library with my external hd. I have a Macbook Pro so I want a good chunk of my library on my internal drive so I can take it with me. When I am set up at home, however, I want to be able to extend my iTunes library with an external drive, particularly so I can access all of my media from my apple tv. Therefore, I need to make it so iTunes pulls from my internal and external libraries simultaneously. Is this possible? If not, does anyone have alternative suggestions? Thanks so much.