Let my try to explain what I mean more clearly....
Currently (without your hack), in order to give a bunch of users access to a private forum, you must go into each individual member profile, and check the box that grants them permission to post in the private forum.
I would like the ability to see ALL the registered members on ONE list, and be able to give access to private forums via a checkbox to anyone I want. Once you click "submit" it updates EVERYONE'S profile at once.
In a nutshell, this is basically your hack does, but instead of writing each user name in manually, I would like to have a list of all the registered members that I can pick from.
For a board that has a lot of members and has various access groups, it is a real pain in the butt to type in manually each and every member that you want to include into an access group.
I hope that cleared things up a bit...