Also, it seems to be hard coded to run on Maya 2017 only: https://github.com/Swannotron/RoadkillProfessional/blob/master/MEL_script/RoadkillProInit.mel#L666
In 2018.1 there's an explicit Model Assist mode to bring back this behavior when no SGs are assigned, but I don't think it's in the latest 2017 update.
No, that was something I made when I was first learning how to using sculpting tools in Zbrush. I doubt I still have that model. But I'll be making some similar animal models in the near future, which I'm really amped about. EDIT -- sorry, somehow I thought your questions were for somebody else. I am not sure what your…