Question .. I want to do a completely fresh instal of my HD but have no back up so this is my plan. If it will work. Plug in an external HD. Reboot mac and boot to the external HD - insert the SL instal DVD and install that to the HD. - Then sign into the app store download and install lion. Thus giving me a completely fresh instal of OSX. Then - go back to my HD inside my Mac and copy accross my home(i think thats right?) folder. When thats done the external HD - SHOULD be a completlely spanking fresh new version of my OSX with all my files, folders, preferences etc all in tact? I can then using disk utility wipe my Mac HD clean/format it and then copy across the entire contents of my external. Have i missed anything?