Mac Mini 2 500B HDD OK I have Lion 10.8 DVD ready to install, however, before doing so I'm confused on the steps. More importantly I want to keep my 2nd external HDD Drive full of media safe and not wiped. I just wish for the main one to formatted and to install 10.8. Now how do I go about this, I really don't know how to proceed. I got an external DVd drive connected to the mini and ready to go but wanted advice before doing anything.