it's not about what you know. it's about who you know. he could very well know the computer manufacturing plant manager in town and give him 700 bucks to machine him a board. there isn't anything to argue here. the question wasn't if HE would be able to - it was if IT was able to be done.
Silly us for thinking that this:
I (have a powerbook g4 and) am thinking about upgrading to a Core 2 Duo Intel chip (or would like to at least). Is it possible?
implied that the OP wanted to know if it was possible to perform himself. I highlighted the sentence structure the rest of us were able to see and use to make this assumption for you.
But if you want to get technical, yes I suppose it's "possible" in the purest sense of the word. A partial list of things you have to do is:
1. Remove the existing chip from the board. This involves desoldering several hundred small, machine-soldered pins fractions of a millimeter apart without damaging the pads or causing a short. This would probably "only" take a few tens of hours to do.
2. Assuming the board survived, you then need to figure out a way to match the pins on the new chip to the pads on the old since they've got different numbers of pins. If you thought about it and were careful, this would probably only take a few years.
3. Solder the new chip to the old pins. (tens of hours)
4. Rewrite Mac OS X so that it can receive instructions from the bootlegged chip that you've jury-rigged to the motherboard. (years)
So yes, it's "possible" just like a rock spontaneously levitating is possible.
Oh, by the way- reverse engineering a motherboard is also bordering on impossible. You'd need to give your technician the board design so he or she could attempt to manufacture it. Since Apple isn't nice about labeling their parts correctly, you'll need to identify the part number and/or values of each component on said board. You'll need to solder the components on yourself or pay a ton of money to have a machine do it for you- the advantage of the machine is that it's faster and saves you a month or so of soldering. Not to mention Apple won't give you their designs, so you wouldn't even be able to enjoy your Intel chip while you're sitting in jail for corporate theft.
Citing the semantics of the English language is idiotic, especially if you have no idea what you're talking about.