Create a route in above Google Maps window driving directions (get directions) (Note:TomTom itn files can be only 48 points long)
The following is VERRY IMPORTANT Zoom into the START point as much as possible and move the starting point a few metres. You can even put it back.
Do the SAME for the END point.
Now copy the link location URL from above GoogleMaps window (Link to this page Link to this page) into the area below and click the button.
This will make an tomtom *.itn file that you must copy or move to your TomTom device. in the /itn directory
Copy GoogleMaps link location URL.(Link to this page Link to this page) and paste.   
http://www.gravoplex.com/tomtom/tripmaster/tomtom_tripmaster_recorded_tour_ride_3.php
This is the Google Maps to Tomtom iternerary converter saw this idea at http://www.houghi.org/tomtom/
The idea for this script was from houghi
The script was made by John Peters from the newsgroup news:comp.lang.php
Congratulations should go to them, not me