Hi all! I have been waiting and waiting for the MBP to be updated and i just could not wait any longer as i needed a laptop now. I am new to Mac, so I decided to just pick up a refurbished MB 2.2Ghz white from the applestore website. I figure I can just use this for now until the MBP gets updated later with a Montevina, and give the macbook to my wife. I plan on working with photoshop, music, probably not any videowork, or gaming. I would like to upgrade the RAM to 4GB since they are so cheap now, and would also like to upgrade the HD to the WD 320GB once I get it in my hands. now my question is, although, a VERY DUMB one..... when I upgrade the HD to the new 320GB, do I have to re-install the OS and all the programs onto the new HD? since it will come fresh from the refurb store? Or do I just put in the new HD and just start it up? sorry for the dumb question.... Thanks!!