Hello, Frans,
If you want to put all Volvo 300 enthousiasts on that map - wonderful idea, I guess - I suggest you to visit also the forums
www.volvo300mania.comThere is a French section there (I`m member here too), as well as a English one. I`m almost sure that many guys from that forums will be delighted to put themselves on your map. Congratulations for you idea again.
Best wishes,
Sorin Marius