Hello Just need to make sure I have this straight in my head. What is the best process to replace the Main HD in my Mac. Would this be correct ? First I make a bootable backup using Super Duper (that is what I use). Then fit the new drive in tray 1, naming it Macintosh HD. Then install my OS of choice (in my case Snow Leopard) onto it. Then do a restore from the back up onto it.