Hey all. I bought a 320 gig WD 7200 rpm hard drive for my Jan 09 unibody mac. However im having trouble installing it. When I start up the mac and hold down the c key to boot from the cd to recover / install OSX it winds up and then the computer restarts. If I put the cd in and do nothing on start it stays blank and shows a file folder. the catch is im using the cd from my black macbook not the cd it came with. since the original disks are at my parents house. would that make a difference? it seems like Ive tried everything. I even put it in an external drive formated it for osx and set it as a boot partition. still the same problem. Is it the cd im using or is there some other issues with installing new hard drives on the unibody Im not aware of.