Hi everyone, I just bought a new macbook (aluminum w/ 2gb ram) and was already thinking of upgrading after reading a few posts. I was thinking of going from 2gb DDR3 ram to 4gb DDR2 ram. I have a few questions based on this... 1-What is the difference between DDR2 and DDR3 ram? 2-Would you recommend upgrading as I am planning? 3-I've read crucial ram is the best option? Is this accurate? 4-Should I install the ram, or have Apple install it? Keep in mind I have no clue about the inside of computers. Here is the link... http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=FF1F93F9A5CA7304&cat=RAM Thanks!!!