Velocd kinda explained this earlier in the thread for what he used to exclude private forums... I used it to exclude newsgroup forums.
In the top of codeblock put:
Code:
$discluded = "50,60,70";
where the numbers are the forumid's that you want to exclude
after
WHERE thread.threadid<>$thread[threadid] $iforumperms
put:
Code:
AND thread.forumid NOT IN ($discluded)