actually it can't be done #1 the frames are different sizes and #2 the connectors to everything are different.i know this because i wanted to do the same thing and found i i could not also i have been inside the i book and if you have never opened one up the risk is not worth it i would say sell your old one save up about 300-400 more dollars and buy the 12 inch g4 for 999 through apples website.
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