Th cp step script provided wouldn't let me copy the third file to /usr/bin because its a readonly directory. I edited the file to point to my Downloads folder and continued running the rest of the scripts as-is and it works now for me.
Quick note though - I wouldn't disregard your work just because of updates. Powertools has other bugs for me like not adjusting tdp automatically until I reapply the settings, and I'm running the lcd preview build right now. So your work is really helpful for forcing a 20 watt tdp setting automatically.