Ok my first try was to edit the desired data direct into the code.
I tried to edit the gm-widget.php just like it was stated in in the post, but now the lightbox window doesn’t show any content.
The small map in my sidebar ist fine.
I don’t understand how the informations are transported to the lightbox map.
Here is the part of my code:
http://pastebin.com/SrY8tLXt
There is already a topic about this problem. I will try the solution stated in this post:
http://ww.wp.xz.cn/support/topic/specify-location-via-custom-field?replies=8
