Well I have a similar request before which seems to do the trick, simply add
to the New Posts and Get Daily
Example Link for New Posts
Code:
http://www.example.com/forum/search.php?do=getnew&exclude=1
You can add multiple forumid's simply by separating them by a Comma. Not sure if that will be suitable for you but thats the only suggestion I have for you. Hope that helps