Adding Fatory Navi

[agc]

I was wondering what it would take to add a navi unit to my car which has a regular Pioneer system. I was thinking of buying a navi unit from ebay and installing it into my car, which does not have a navi. Is this possible and has anyone ever done this before

[ED.]

I know Raz was interested. I could do i ton my 740 but it would cost between 1500-2000 dollars so I haven't done it yet. Here is a pic of the Nav units that you will need along with part numbers. If you find a set of wires that leads to the dash you should be in good luck. If nto it will be harder. Have a look. If you did it you would probably be the first.