After purchasing my MacBook about a year ago and seeing the light, I just couldn't use my old PC anymore and bought a Mac Pro. As I wait the three-plus weeks for it to arrive, I have a few questions about the automatic upgrades I plan on making. Firstly, I plan on upgrading to a 500GB HDD (for the extra cache). As far as upgrading goes, do I just pop in the new HDD, put in the OSX disk and voila? Or is there other necessary steps I need to follow before hand, or things I need to have ready (this will be a brand new computer anyway, nothing to worry about losing). Secondly, more memory. I plan on buying another 2G to bump my total to 4G, no problems with that, right? I'm just a bit wary about any inconsistencies or hardware issues switching myself from PC to Mac. Thanks a ton in advance!