[kh99]

Hmm...you could try this: create a plugin using hook error_fetch and code something like:

if (!is_array($args[0]) AND $args[0] == 'forumpasswordmissing' AND !$vbulletin->GPC['ajax'])
{
    global $forumid;
    switch ($forumid)
    {
         case 1:
         case 2:
            $args[0] = 'forumrules_1_2';
            break;
         case 3:
            $args[0] = 'forumrules_3';
            break;
         // etc
    }
}

Then create the new phrases you need (by copying the original forumpasswordmissing and editing it).