I have 2 older Macbook Pros -- first generation 15" CoreDuo and a late 2006 Core 2 Duo. Both have issues. I want to swap parts to create one that works properly. CoreDuo issues: 1 cooling fan is bad, airport card doesn't keep a signal Core2 Duo issues: a string of keys don't work, monitor goes out with heavy video use (turns purple then blank), dvd drive doesn't work. Swapping out the fan and airport card/antena from the newer C2D to the older CD wouldn't be hard, but the C2D is faster and has FW800 (CD only has FW400). Going the other way seems a bit tricky. I don't know if the display is going out or the video card. Any advice?