I managed to find out where the jquery script generates the data so I have done some modifications based on
LyteBox v3.22 by Markus F. Hay https://www.dolem.com/lytebox
and his exif reader by Jacob Seidelin
I modified the variables to match them to the ngg lightmox variables but now the lightbox does not open anymore.
So I uploaded my mod as a textfile maybe some developer of ngg or a java script prof can make this work.
https://www.rose-ol.de/adrian/wp-content/uploads/sites/2/2013/08/jquery.lightbox-0.5.min_.js_.txt
Hope you can work on thisone
