I am doing a program for the XDA II that will send your GPS location back to a given number i will post a few screen shots if you like.
You will be able to select any com port that you like it works at the moment with All TOMTOM devices.
Did have a Ipaq 5450 with a P800
Did have a XDAII and i loved it.
Did have a XDAiis and loved it.
Did have a HW6515 and i and loved it.
Did have a EXEC and i am lovined it.
Now i have a XDA Orbit And its so Cool
TOMTOM 650 UK