Wow this week has gone by fast! Sorry for the delay again.
I was able to go over
Lexx33 DLC posts and there was nothing "new", some of it was user generated content, which if someone else wants to host or handle, go nuts. I only work on officially released Microsoft or official game developer DLC stuff. The closest thing we did to 3rd party DLC was Bungie's favourite game types on the Halo 2 installer, and that was from Bungie. The rest of the DLC matches up with copies we already have, and have already released. All that being said, I really do appreciate the effort to offer something new, not just old copies of retails or their own homemade stuff.
That
hobojoe44 is quite clever, you guys should listen to him

There were a handful of DLC disks out like the Halo 2 one, the Monk from Jade Empire LE, and Mechassault 2 Lone Wolf CE's bonus disk, not to mention OXM and Exhibition disks. But most of those do not contain the very last title update, all of the DLC for any given game, and most of them have out of date copies of the DLC. The Halo 2 Multiplayer Map pack is a great example, 1 pack is missing, another is out of date, and the update is also old. We did use some of these disks as sources, but I'd say the vast majority was directly off xbox live. The most important thing to mention about these disks is that very few (if any) will work on a 360 that hasn't been set up for homebrew, making them all but pointless now.
InsaneNutter is correct regarding Midtown Madness 3, it's just like Fight Club, there is a secondary signature, or lock that I don't know the first thing about. So neither DLC works. For Fight Club the work around is simple, the DLC is just music, so I can make a soundtrack installer. The MM3 DLC workaround is much more complicated and involves merging game files with the raw files from the DLC packages. It's covered earlier on in the thread, read back a few pages. Anyway that's why I killed the link for it.
Other than some sports rosters I never got around to, I don't think there's much I can do. Maybe title update packages made for Freeboot consoles. If there is anything specific anyone needs done, let me know. I will try to make myself more available here.