I want to backup my entire hard drive onto an external hard drive so that I can reformat back my laptop to factory settings. I just want to erase my laptop hard drive and start fresh with a clean install of snow leopard or lion. However, I want to have a bootable backup of my current hard drive so that I can access my old files if necessary. I'm reading this recent thread here:http://forums.macrumors.com/showthread.php?t=1213627&highlight=clean+install and I am using CCC to do it. However, I got this warning: Does this mean my backup won't be bootable? Do I need it to be? I just want a complete backup that I can browse through and copy files from my external onto my newly formatted drive in my laptop if I need to. I've never done this before so I just want to make sure that all my files will be retrievable once backed up on my external. Thanks guys!