Files in the wrong place?

[david]

I have been exploring my new installation of Gimp (Ubuntu 64 bit).
In usr/share/gimp2.0/scripts I have come across the following 6 .py files.

btn4ws.py
cmyk-tiff-2-cmyk-pdf.py
contactsheet.py
ez-perspective.py
file-ora.py
layerfx.2.8.py

Obviously, they do not appear in any of the Gimp menus.
I am curious to know what they are doing there on a new installation!

Also if I were to move them to:
/.gimp-2.8/plug-ins or
/usr/lib/gimp/2.0/plug-ins

are any of them going to work?

david.