Right I'm considering purchasing an iMac, and upgrading the ram to 4GB, however i've noticed if i bought the ram from crucial it could save me a significant amount. The problem is, I've never owned an iMac before, nor have I ever opened up a computer to fiddle with components, so I was wondering would I be able to install the ram myself with relative ease? without making the warranty void? ...if it seems a complicated task, I maybe inclined to pay the extra and go with the apple upgrade. Any help is appreciated.