Okay, I'm back to getting the layout working again. Just found something incredibly strange.
I created a sandbox site, basically cloning the current state of our forums & DB. When I activated the vbGallery FORUMHOME MainBlock on my sandbox site, it worked just fine. However, when I did the same on my live site I got the results from my original attached image...
At first I thought this was due to me having the CMS activated on the sandbox and not on the live site but deactivating the CMS on the sandbox didn't crash the MainBlock.
I just noticed something different between the sandbox and live site. In the admincp when I expand the vBGallery menu option in the live site, the options "modify layout" and "import / export" are showing up encased in asterisks and in the sandbox they show up just fine. Here's a screen from the live site: screen.JPG