About a week ago my hard drive overheated and my Macbook froze up. Now my Mac OS does not start up. I had the Macbook for a few years now. When I run the Leopard Install CD->Disk Utilities, the Mac Hard drive is not displayed. 1) Is there anyway to get repair my hard drive? 2) Should I buy a new notebook hard drive and replace it myself? 3) Should I get the Apple repair to fix at it?