I have a 13.3' Unibody MacBook (2GHz Intel Core 2 Duo, 4GB, Bus Speed 1.07GHz running OS X 10.6.2) and want to use it in clamshell mode with an external monitor and keyboard. More precisely, I want to use an old Unibody MacBook as the keyboard and use its trackpad instead of a mouse. Can this be done? How? How can I connect the old MacBook (serving as a keyboard only) to my new MacBook? USB? Bluetooth? I don't need the old MacBook to do anything other than serve as a keyboard and trackpad. I'd like to rip off the old MacBook's screen as it's broken and I want to put the old MacBook on my keyboard tray to free up room on my desk.