MacBook Pro 15" Core 2 Duo Model A1211 Hard Drive Replacement
Be very careful when removing the hard drive cable from the logic board. Even though I was very gentle the connector came away from the ribbon rendering the cable useless. A replacement cost me $70 here in the UK.
As Basiliscus says it would probably be better to omit this step as it is possible to remove the hard drive without disconnecting the cable from the logic board.