After a lot of help from Xileh I felt I was ready to do the install myself which took place this sunday

The unit works perfect, I even went ahead with the Can low and high connections from the air conditioning and now I'm able to switch AV sources from the mode button, it doesn't works 100% of the time though so sometime it's needed to press it more than once.

The CAN box automatically detects when the car is on reverse and switch the interface showing a virtual road, so it will be pretty easy to connect a rearview cam later on.

I'm uploading a video at the moment to show how good it works, will post it up tomorrow morning.