I had the same problem. The best solution I found was to purchase a magnet type holder from Carphone warehouse. Place the magnet between the
VSA and mph/km buttons and you get a metal strip to fit to te back of your IPAQ. You are able to view the navigator thru te steering wheel. It does not block the instrument panel at all,even with the navigator in landscape mode. Maybe a bit tight if you wat the charger connected. I plan to put a holder in the boot to charge the ipaq if I need to. I have also purchased a cigerette lighter holder from Maplins to wire an extra socket in as per one of the modification threads posted on the forum. If you would like some photographs I will try to assist. The ipaq is easilly viewed and easy to touch