Mine was a straight plun-n-play swap. Albeit quite tricky to actually physically swap the modules over in the X3 because of where it is and how the mounting frame and bolts are accessible (or not). To do it right needs the whole of the trim on one side of the boot to be removed.

We don't have full DVB-T broadcast services in the UK yet, and most transmitters are running on low power until 'Digital Switch-over' which is a long drawn out affair (well, this is the UK after all ) that is done by region. We won't get DSO'd until March 2010. So, using it whilst moving is pretty poor to be honest, but then the Analog wasn't much better really. Oh, and of course it's illegal here (like most things now!)