I got an old 15-inch 2.2ghz macbook pro (model MA895LL/A) from a friend and I am trying to get this thing running as well as I can make her without buying another mbp. I have a 2012 model win7 laptop w/ an i5, so It's not my primary machine, but it runs pretty well now and I'm thinking if I could get it a bit quicker then it could become my primary (I'd like to switch to MAC if I can, but I am NOT paying full price for one. I can get the specs of a $2000, mb for $850). Anyway; I've seen that this model is spec'd for 4gb of RAM by apple, but many say it can handle 6 just fine, although the reliability of 6 is varying. I'd rather have 6, but if it's very unreliable, I guess I'll just stick with 4. I'm also curious about hard drives and anything else I can add. I don't know anything about hard drives so literally ANY info on how to increase any speed/performance/etc. from an upgraded hard drive would be appreciated. I paid less than $100 for this MBP so I'm willing to put an additional $150-$200 into it if I can get some significant improvements. Thanks to anyone that can give me some good tips!