[Xenon]

ahh well, i see

no problem at all, just open newthread.php
find

PHP Code:

$foruminfo=getforuminfo($forumid);
if ($foruminfo['allowposting']==0) {
  eval("standarderror(\"".gettemplate("error_forumclosed")."\");");
} 


below add:

PHP Code:

$threads=$DB_site->query_first("SELECT COUNT(*) as counter FROM thread WHERE postuserid=$bbuserinfo[userid] AND forumid IN(13, 17, 19, 20, 26, 27, 33, 34, 44, 45, 51, 52, 58, 59)"); 
if(in_array($foruminfo[forumid],array(21, 28, 35, 46, 53, 61)) and $threads[counter]<5) show_nopermission(); 


that should be what you wanted