I am installing a new hard drive on a new macbook. I have not installed anything except the updates on the macbook yet as I have been holding off for the hard drive to arrive (and RAM). So my two-fold question... Can I install the hard drive and then insert the disc that came with the machine and then do the updates again or do I need to do some kind of format first? Another question just popped in my mind... The drive that I am removing will be enclosed and used as a backup. Do I format it clean to use it with the time machine? If these questions are stupid, please forgive me, I just made "the switch" and want to be sure I am doing this right.