I just bought a new unibody 15.4" Macbook Pro (2.4GHz, 2GBRam, 250GB). I want to upgrade to 4 GB Ram and a 320GB HD. I plan to buy the 3 year Applecare Protection Plan. If I upgrade, will I void the Applecare?? and/or the 1 year warranty? Appreciate any information or personal experiences on this point. Many thanks.