I just replaced my hard drive in my mid 2008 17" Macbook Pro with a brand new 500GB 7200RPM hard drive. I followed the installations guides to the T and reassembled the computer. Upon inserting the OSX install disc, it won't read the drive for me to select it to install. It just eternally searches for a drive. What am I doing wrong? What might the problem be? Any help would be great.