Mat, I fitted my own car-kit & removed the centre console, glove box etc, now im no auto-electrician no do I do any work on my engine, but I found installing the car-kit very easy. Putting back the stereo is the only bit you need to be carefull of as the sides are razor sharp & can damage the sides of the console, but if you follow the guide in the knowlage thingy, its realy straight forward.
If you decide to go this route id happily talk you through it.
Stuart