Request: Forum permissions depending on password

I would like to have a hack (on my vB 2.0 beta 2) that would allow people who had a certain password to have certain forum permissions.

Like, at my board, a lot of people register w/ the same password (50 per group?) due to the fact that they are part of the same group. I would like them to be able to post/respond to posts in a particular forum, but only them. Nobody else can post/reply there, but can still view the forum.

I want to do it this way rather than usergroups cuz I got like 50-100 groups of 50-100 people in each, plus more registering all the time.

Please, if you can make this hack if its not to hard (ASAP) I would be VERY greatful.

two things. he didn't do [REQUEST] and two some ppl that have no idea how to use or do php need help, They can do this through examples and the pros, how are they gonna get any ideas if nobody speaks out and says what they think should be made.

kier, once i made that response, he pm'd me.

he said i was right