I know that this maybe deemed as being completely off track but I wondered if anyone had tried to use Mapmonkey or Destinator 3 with the TomTom maps.
I noticed that the provider of the maps was supposed to be the same company!!! Any ideas??
It may be Navteq that supplied the data but the destinator guys would have specified the format they wanted their maps in when they bought it. It's completely proprietary and very unlikely anything else will work.
Destinator 3 For PC! - http://www.map-monkey.co.uk/