My 2006 13" MacBook refused to boot or even recognize the hard drive one day, so a replacement was in order.
Following the ifixit.com guide I was able to complete the hard drive replacement in under 10 minutes, from start to finish. Once installed, I was able to format the drive with Disk Utility and then use my external USB drive to clone OX X 10.6.8 and all of my programs into the new HD. Perfect!
This is an easy repair. It is hard to believe that Apple charges so much for the same thing.