The file browser isn't completely broken. If you search by Gamer tag you can find files, so why not open it up?
Could you of not just of sent a pm to one of the admins instead of making a thread that is designed for spam.
The map section requires a direct download link in your post, which at the moment isn't feasible. Searching by gamertag isn't the same. Next time PM a staff member about this.
To expand further, you can also USE THE SEARCH BAR http://www.forgehub.com/forum/customer-service/142383-why-must-halo-4-maps-section-closed.html