I know this may seem like a very silly question, but after fitting the new HD what do I actually do? Heres the story: I was on my MacBook Pro when it suddenly was freezing and crashing, I wasn't able to force quit any applications and this resulted in my turning off by holding the power button. When I turned it back on, I get the flashing folder icon. Tomorrow my new HD will arrive and I know how to fit it, but what I can't find anywhere is what to actually do from there? I have 0 disks as its a Mid-2010 13' MacBook Pro (So no disks came with it). Do I simply put the new HD in then turn on the machine or do I need to hold Command + R to re-install OS X or what? Any help and extra tips would be appreciated.