Thank you for the quick response Rattus.
Your above solution doesn't work because the real issue is one of nested shortcodes.
The "main file" in the mother site uses the slice plugin to include "common code":
The "common code" is:
some html code
more html code
The mother and all slave sites call the "main file" the same way the mother site does:
However the [flagallery...] shortcode never gets expanded when the "common code" is called by a slave site. It does get expanded when called the the mother site.
So my thinking was if i could put the absolute path to the gallery pointing to the mother site gallery it might work, but it doesn't.
Obviously the nested shortcode issue is not a flagallery issue, however I think that allowing absolute path to the gallery in the slave sites might solve the problem???
I installed the Outerbridge Nested Shortcodes plugin to no avail.
If you have any other suggestions I would appreciate them.
Thank you for your patience.