It is released as an "Addon".
It seems to be entirely about modifying existing code.
http://xenforo.com/community/threads/xfb5-xfr-infractions-v-1-0-2-en_ru.9601/ (of course this one, has files and code modifications.)
Q: would this be better referred to as a "Hack" ? vs. Addons where they don't require core code modifications ?