You can use Franson GPS gate and in the settings after it finds your GPS and you hit Yes for Com 4. You have 4 options displayed with check boxes. Make sure you check Share with Active Sync. and connect your HD2 via cable or Bluetooth and see that the active sync is running. Then run GPS mapping app from your laptop and let it search and find it out automatically, otherwise you might need manual input.
I have used it on many long trips in the USA.