After much digging around in the forums and much perusing of the documentation that came with this thing, I discovered nothing.  So, I did it my way, digging into the code of each page being called.

I now know that you cannot change sidebars from inside the Dashboard.  Instead, you have to do it manually and then upload the page.  You can always send it to the editor, but in order for changes to take effect, you need to chmod each page being edited to be writable.

All in all, this Remix thing is fucked up.