TomTom POI details page

 

I just got a TomTom XL 335TM and noticed that the built in POIs have a details page that shows addresses and other information like Garmin units.

For Garmin units this information is entered as a fourth data element in a CSV file and there are many programs that will convert that to a proper GPX or GPI file. However, I have not been able to find any program that will convert a fourth data element to an OV2 file. Instead the fourth data element is not used.

Any help on this?