Okay so I purchased my macbook around 2007 with 2gb of ram, and I was wondering what I had to do to get my ram up to 4 gigs. Obviously buy more, but what kind? and how much room does my laptop have to put more ram into it? I'm guessing I would need 2 sticks of 2gigs of ram. What kind am I looking for? Screen shot of about my mac is below.