Well, here is the finished project.
First, the camera mounting bracket made from 3mm sheet steel:

It uses the passenger sun flap mounting to fix it in place:

I used the camera which came with the kit for the forward view:

Here is the camera fixed in position:

View from outside..you can hardly see it

:

Here is the normal view I get when following a car I want to overtake:

and here is the view in the tft screen:

In a controlled experiment, I measured the distance ahead that I can see in the screen, but not from the driver's seat...my visibility is some 600 yards further past the car in front.All the wiring etc fits inside the centre roof console, and passes under the headliner, without showing at all.The camera is removable within 10 seconds, as is the screen.
Regarding the rearview mirror..using the 'depth of field' in the human eye, you can switch from looking at the screen picture, to the reflection in the screen in milliseconds, so the rearview remains the same.I am going to fit another camera in the rear window, and at the flick of a switch, can change from one to the other.
Safety for the cost of around $150 dollars

Nick
[This message has been edited by fierofetish (edited 08-06-2007).]