As the title suggests, I made the OWB Big MT Transportalponder and DM Slave Collar non-quest items. One esp for each, just drop in your Data folder and activate.

http://newvegas.nexusmods.com/mods/50032

you mean the collar in DM? Wouldn't that ruin the entire idea of the DLC in the first place?

No, it stayed in my inventory after I finished the DLC, so this is so you can remove it from your inventory when done, not cheat during...

weird, it always left my inventory when I finished the DLC on Xbox.

OK, just finished Lonesome Road, so added a file for the Laser Detonator. Also added a merged esp for all three.

You should also do the water breathing mask from that one quest with the Boomers if you haven't already. That's still stuck in my inventory.