Don't quote me on this but my understanding is that you can code in the CIC into your car relatively easily using the build date trick (if needed) to add/update your VO.
The problem is that this won't enable some features like satnav, or rear view camera. For this you need a special cable (connects to the MOST network), or the OBD port activator or the vin emulator you mention.
Without this, the radio will work fine just without the goodies.
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