Hey all. I have an i7 MacBook Pro. Recently I wanted to boot into the Mac OS X Install Disk (the Snow Leopard Install CD, and not the grey CD that came with my macbook pro, as I lost that one) to verify my disk as I was getting several problems. So I restarted, hit option until "Macintosh HD" showed up. Then I hit "c" and "Mac OS X Install Disc" showed up. So far so good. I then selected the CD, and hit enter. It started to boot up and my cd drive started to make whirring noises, so I knew it was all good. And then, it went into the grey screen with the Apple logo in the middle. However, with it taking a long time, I went for my usual jog (it was my jogging time anyways). But when I came back (over an hour later) it was still on the grey screen with the apple logo. Can anyone help?