I don't see a problem with doing that. Here's how to do it: http://www.ifixit.com/Guide/Repair/Installing-PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Optical-Drive/555/1
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I don't see a problem with doing that. Here's how to do it: [guide|555]
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They both use the 12.7 mm drives and they are Interchangeable. Use the connector from the original machine in case they are different lengths.
I don't see a problem with doing that. Here's how to do it: http://www.ifixit.com/Guide/Repair/Installing-PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Optical-Drive/555/1