Ok so i just purchased a macbook pro a couple of days ago and i got two questions. 1. I got the 2GB RAM version because I dont want to pay apple $160 more for nothing. Does the 2GB MBP come with one 2Gb stick or two 1Gb sticks? 2. Also, if I buy this off newegg and take it to bestbuy to install it (they said they will), will it void my warranty?