This took me an entire evening of trial and error, but I finally got it to work. The mod I've been wanting since the game came out on Xbox One. I'd love to get just the helmet to overwrite the original Spec Ops helmet, but I don't even know where to begin with that.
1. Backup your files! (At least the 14 files that this mod overwrites; double-check they're the right ones) 2. Drag and drop the downloaded files into \deadrising3\data\models\clothing, overwrite all files. 3. In-game, switch to Nick's default mechanic outfit.