Is it possible with any viewer to change someone else's rezzed object to a different group, without asking owner to, if you own the land?  Some scripts can be manipulated this way and it would be a dream if so.  Thanks for future answer or any other manipulative thoughts and ideas.

Unfortunatly no, only the owner can change the group.

@ZeroThe10th ...Damn.  I thought for sure that if I could change the texture of no mod mesh eyeballs in Revelator, something like this would've come along by now, just that maybe I missed it.  Oh well.  Thank you very much for the confirmation.