As far as I'm aware, whenever a new texture replacer is installed, you need to run the Archive Invalidation utility. But NPC Face Color Unlocker also looks better without running that utility. Odd colors start popping up on faces if you run it. So for now, I just installed NPC Face Color Unlocker last, after running the Archive Invalidation for all the other texture replacers I'm using.
But if I want to install some more texture mods in the future, is there a way to have the Archive Invalidation ignore the files from NPC Face Color Unlocker? Would I have to reinstall that mod again afterwards? Or do I just not need to run Archive Invalidation again after the first time? I'm a little confused about this scenario... :S