You can do this yourself, not sure how well it still works.
Isn't the directions in the FAQ? Add the line to your startup.txt, while in WinMo plug in headphones and make a call, boot Android while call is running & headphones plugged in.
Be warned, you will ONLY get audio out of the head phones, and I also heard the speaker makes some interesting noises as well doing this method.
Either that or wait for the 3.5mm jack to get a proper fix
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