So after several hours of tweaking/trying to understand how the code works, I still haven't gotten the functionality I want . I have no doubt it is due to my php incompetence, but if you could be a bit more specific as to what I would need to edit, that would be great.

Also, to be clearer as to what I'm looking for, I made a diagram! (attached)
Essentially, I just want the user to be able to click a button (in this case the "Back to Overview" button) and have the panel display the general overview of the categories (as opposed to linking back to a separate overview page; I'm looking for similar behavior in terms of panel appearance to the other buttons). Hope that makes a bit more sense.

Thank you Krileon (and/or others!) for any guidance you can provide! This has been driving me nuts!

Hi Krileon,

I just wanted to thank you for all the work you've done. I also wanted to edit or alter the panel menu, or maybe it's better stated as the Group Menu in the GroupJive panel? Anyway, I just eliminated the text of the link I wanted to do away with. That will work for now.

Just as an FYI, the link I wanted to do away with was "Back to Category" - the people in these groups should not be able to get to the category screen at all. I disabled Display Category in the configuration screens, but that didn't seem to affect the group menu links in the overview panel at all.

Anyway, this is a tremendous amount of work you've done to get GJ into CB. Thanks so much once again!

Schelly