We are cloning an image from my primary install to a external HDD, after SupperDuper we need to make it bootable with Chameleon bootloader .

How To Clone your OS X Lion Hackintosh | Konteudos

I am trying to upgrade to 10.7.2 and I do all my testing in my clone drive, I got kernel panic , so I did not mess my primary install

Recommend to have a clone of your install , it is easy .

regards