Multiple Boards, using same database?

[interrealm]

I'd like to know if the following is possible:

I'd like to use the same database, more specifically, the user tables, for more then 1 board.

Is this possible? IN a way, the way I am thinking of doing this is to assign the same "database" to each board, but configure the tables to use a different prefix per board. But leaving the usertable the same name. I'm not sure how this would effect the user settings (mods, admins, usercounts).

Any ideas?