I put a new hard drive into my macbook, installed it properly as far as I know, but it does not appear in Disk Utility, either from booting from the FireWire copy of the OS, or from the DVD disk utility. What could be wrong here? It's a SATA drive so there are no jumpers, and I assume it is formatted for windows from the store (its a WD). All I can think of is that it's not installed right... but I was able to replace the L panel under the battery and put the batter back in properly. what could be wrong here?