Hallo Stefaan,

welcome to OpenStreetMap. In case you are stuck with something, there are a number of ways to get help

• http://help.openstreetmap.org
• or one of the fora on http://forum.openstreetmap.org
• there are also plenty of mailing lists, http://wiki.openstreetmap.org/wiki/Mailing_lists you can subscribe to.

happy mapping