yes it should, but i haven't tested it.
as not much has changed i cannot imagine it doesn't work

i install this, but... when i try to put $forum[subforums] in
forumdisplay_forumbit_level1_nopost, forumdisplay_forumbit_level1_post,
forumdisplay_forumbit_level2_post, or
forumdisplay_forumbit_level2_nopost.
it shows nothing, I put it right after $forum[description] in all of them, but it doesnt work
any suggestion ?

and, I got this too:

Parse error: parse error in ***/www/forums/admin/forum.php on line 38
when trying to modify my forums

well obviously you made a mistake while installing the hack.
use an backup and start again, and be careful when changing the files, that you don't make a mistake again.

once the php file works, the subforumcache will be visible, too

may it be....because the others hack ? I did install some others

parse error means you just make a mistake while hacking.
it could be for several reasons, but it's just a normal php error you caused while editing.
it has nothing to do with the functionality of any hacks normally

ahh, I did it again, more carefully than before. But I still get an erorr, it said Prase erorr on line.... ( I didnt remember ). And it is in the start of your code
what should I do ?

i cannot help you then.

the code is working, so it is an error on your side.
Maybe your editor makes a problem.

As said, i can't help, the code does not contain a parse error or it won't work on the others board, too

ok, I can MAKE SURE that I did nothing wrong, but there is no sub-forum displayed in forum home.
Or I have to add a sub-forum after install this and it will show up ? it has no effects to the old sub-forums ?

the subforums are cached, that is why you have to make the changes to admin/forum.php and update one forum after the installation, so the cache will be reconstructed