The whole thing, or at least that is what I did, I didn't try it with just him. I'd assume you would need the whole file though. This would certainly conflict with other mods using this file, but not the main mod. I mean it overwrites it, so how is that conflicting with it, if it uses it's data but modified?
It makes official patches ineffective, as it overrides anything the patches might change with an older version of the data.
