The fake MAC address problem is because you need the binary calibration tool for the new driver as pointed by the logcat output. It can't be shipped with NITdroid as it is not distributable by Nokia but you can download it and place it in the right place (again as suggested by the logcat output) and NITdroid will use it.

It is optional but if present the calibration tool will set the real MAC address, better calibration data plus other undisclosed parameters (maybe region frequencies, etc).