Ok, I'm here again! Now, I have a route saved on/in mapsource and want to display it on /in a forum. How the hell do I do it? I have no idea whatsoever.
I managed to use google maps to show a route in this thread by using the "display in google earth" mapsource function then copying the XML of the google earth tracks into a file that I hosted on my server and then creating a google map URL with the file as the query parameter. It is then interactive.