GRF,
Look here:

http://www.gournetusa.com/forum/topic.asp?TOPIC_ID=76

Geoffroy's site doesn't have a lot of traffic. But, this particular post seems like it will answer your question.
I imported the Darne for over a decade, and can answer most questions. I check in here every day.
Welcome aboard and good luck with the project.

Best,
Ted