Noob question here. I'm about to do the same thing with the hard drive from my old iMac. I suspected all that would have to be done is something like running Universal OSX86 Installer on the drive to install the bootloader and extensions, so I did that before disconnecting the drive, applying the package for the motherboard I planned to buy. But now I bought a slightly different motherboard (Gigabyte P35-DS3R instead of DS3L) and want to clean up that drive before hooking it up. Also want to try using the P35 Control Center as well, which should be easier to play around with. So which directories do I go into to delete all currently installed kexts?