Hi! I have a macbook unibody ( 2.4 ghz 2 gb ram). I have felt that it is getting kinda slow when I have many programs running. A friend of mine told me the solution for my problem would be to upgrade the ram from 2 to 4 gb of ram. i checked my activity monitor for ram and it said free: 17 mb wired: 182 mb active 1 gb inactive: 567 I don't really understand what the numbers mean so I wonder if you guys to tell me if a 4 gb upgrade would make a big difference and what the ram activity monitor would look on a "snappy" computer? Thanks!