ok, here is a nice little trick.
Firstly, copy the contents of your forumhome_level_2_post template and overwrite the contents of your forumhome_level2_nopost template with them.
Then set up a hidden forum as a subforum of the current forum link forum. Make a note of the forumid number as you will need this shortly.
Now move your existing forums to be subforums of this new hidden forum.
Then, in your forum manager, change the current forum which is a link to be not a link and a category. In the thread title, right at the very beginning, put
Code:
</a><a href="forumdisplay.php?f=x">
replacing x with the forumid number noted earlier.
Any problems give me a shout, but I've just tested it on 3.6.2 and it works perfectly here.