So I put a new 320GB hard drive in my MBP 17". I wanted to do a fresh install with the CD that came with my laptop, but I accidentally put in the CD that came with my iMac. So it says "Cannot install Leopard on this computer" Ok, fine. But it won't let me eject the CD!!! In the Disk Utility program in the Mac OSX Installer, it won't let me eject the CD because it won't let me unmount it. What do I do! HELP!