Hello, I'm trying to do a clean install of OSX Lion on my first MBP that came with SL. When I boot from the DVD and open up Disk Utility, I'm confused whether I need to Erase the "Disk" or the "Volume"? I've attached a screenshot, you can see the "320GB Drive" and then "Macintosh HD" in disk utility while the system is running which is what I see when booting up. But no matter which I select, they have the same options. Once I erase the disk, or volume, do I just exit Disk Utility, reboot and I should get an option to Install? (instead of "Reinstall"). Thanks.