[OGDev] Public domain node images

[Kake L Pugh]

I'd like to use some public domain photos as node images on RGL.  I'm
not entirely sure how to do this within the "node image" system - the
OpenGuides templates automatically put the little "(c)" copyright
symbol in front of the name of the person who took the photo.  I found
a public domain licence on the Creative Commons site:
  http://creativecommons.org/licenses/publicdomain/

but I don't really understand this sort of thing so I thought I'd ask
for help here.  What should I put in the little boxes on the
OpenGuides edit form in this situation?

Kake
P.S. Yes, they are definitely public domain; a friend of mine took them.