Here are some notes I took after piling through this topic, and yes the author could have just updated the original (1st) post, but he probably became just as frustrated with this mish-mash forum software as the rest of us;

Step 1: Backup your Fireboard files
Step 2: Upload the files into the correct directories (follow the archive directory structure) from
Joomla root)
Step 3: Modify or create a forum via Components >> Fireboard >> Forum Administration
Step 4: Set the "Public Access Level" to the lowest level of private use (must be at least
"Registered." This shows it as a "private forum" so will allow you to assign users to it)
Step 5: Go to "Restricted Forums" from the Fireboard Cpanel or the menu
Step 6: Click on the forum you wish to assign users to
Step 7: Click "Add Users"
Step 8: Start typing the users name you want to add, as you see it in the list Click it (it will show

up highlighted in the list box)
Step 9: Click Save

That's it the forum is now private. If you do not add users to the forum then it reverts back to
standard fireboard functionality, if you add only a single user to the forum then only that user will
see the forum. NOTE: even if you are a Super Administrator, unless you are listed as a user of the
private forum then you will not see it in the front end, that includes you the person doing this.

I know that sounds odd, but the reasoning is that it is easier to exclude all than allow for super
administrators, and in my system I have several super admins but they still don't have access to all.
This means you also have 100% control over exactly who can access the forum rather than being group
based.

You should be mindful Fireboard is not ready for prime-time. I realize you, just as I was, are desperate for a unified log-in but hacking together this mess (Fireboard) will ultimately cause more problems when (if) the developers get off their advertising agency philosophy and fix this thing. After playing with this Frankenstein mess I gladly went ran back to SMF.

I still laugh each time I log-in here, and no matter from where, I get directed back to the front-end, forcing me to see the "Featured Template." Ever been to an IKEA? You have to walk a maze (the entire store) before finding the exit!