First off, let me say that I am in no way an affiliate or anything of Grunts R Us, I merely think that this could be of use to many people I found this on halo.bungie.org, so I'll just quote the post there since there really isnt a way to say it better. its very useful, again, link is http://gruntsrus.com/viewpage.php?page_id=85
just to let everyone know, this does NOT suddenly create an extensive database of the files forums. It is essentially like using b.net's search, as your search params will turn up files where the word is merely in a reply. However, its ability to restrict files to type, map, and gametype do work flawlessly. So even though it could be better its still pretty good I would definitely like to see bungie make a nice file forum search that lists things by Item Name/Topic name instead of Bungie.net Forum Reply thing, and allowed for the same params such as item type, and map and gametype.
I gave it a go, and it worked. It worked flawlessly all but one time, and that time, it gave me the author but the wrong map.
I get a "this site contains malware" warning in every browser when I try and use your link El Capitaine : (
Same, I have avast antivirus resident protection on. As far as I know it hasn't been wrong yet, I would not visit that link. I think it's best if you remove it to.