I am thinking about upgrading my MBP 15" mid 2010 from 4gb to 6 or 8gb. I have never done this before so my question is: How difficult is it to take out and install new memory? Where would I get it from and what am I looking for when I buy it, what is it called? Do I need to buy specific tools for the job? Is there somewhere that shows you how to go about installing new memory? Is it expensive and is it easy enough for a Newby to do? Any help is appreciated, Thanks.