Fitting the iPhone 3GS into an iPhone 4 body

I have a werid and random question. I have an iPhone 3gs that I specifically bought instead of the iPhone 4 because of a blue "Mikey" I use for recording studio sessions. This isn't a real die hard emergency question but I noticed that you guys at ifixit.com have torn apart both the iPhone 3gs and the iPhone 4. I really prefer the look of the iPhone 4 but needed the functionality of the 30-pin connector from the iPhone 3gs. I guess the iPhone 4 is missing a stereo setting on that 30-pin connector or something to that affect and causes the microphone to not work on the iPhone 4. So my question is, is it possible to transplate all the 'insides' of the iphone 3gs into the body of an iPhone 4 and have it still function?