We (me and Uli) are currently looking into what numbers are best to use, so that it can be installed in any roster. They'd have to be completely unique and we could the last faceID number as a start, so anything higher than 45018, which is where it ends. But i'd suggest perhaps that each face from each country would have it's own code, so like samoans can be 77001-99, and Kiwis could be 78001-99, that way it'd be a good way to index them and you can say that your kiwi facepack would go from 78001 to 78016, if that makes sense.