I plan on swapping out 320Gb hard drive on my 24 iMac 8,1. Can I simply take the new bootable clone hard drive that I made and simply drop that into the machine? Will the computer see the clone and automatically boot up into it? Or do I have to make bootable clone then install a new blank drive into the machine and clone it back in? Other question is...Would the Caviar Black be too hot? Or should I go with the Caviar Blue?