Can you categorize threads into 'subforums' ?

[z0diac]

I'd like to have my athletes forum categorized by letter (subforums named A, B, C, etc) and have all posts with athletes starting with A in the "A" forum, B in B, etc...

But I'd like the parent forum to contain ALL the posts.

So if they're in the main forum, they get ALL posts, if they go into a child forum they get just the posts that are part of that forum.

With 'stock' vB this isn't possible because it MOVES the post into the sub-forum, making it no longer available in the parent forum.

Is there a mod that does this?? I can't find anything.