I took apart my MBP 2.4ghz, 200gig HD, whichever model that is. I took out my 200 gig HD and put in a WD5000BEVT 500 gig and put it all back together. I plugged in my external with time machine backups on it and turned on my MBP. Said there was no bootable disk and to insert disk and press any key. I put in my leopard CD and the keyboard didn't seem to be responding. I shut it down and plugged in my HD i just took out via USB external enclosure and held in OPTION to try to boot from that drive, the only thing that showed up was the Leopard CD, however it made me think that my keyboard was working fine. It took me to the install screen and such and when it got to "Select Destination" screen there are NO drives showing up. Please help! I read tons of comments on Newegg and on here about how people used that HD as an internal replacement. Anyone experience this?!?!