Extract the files into your Umbral Abyss campaign folder. Allow any overwrites.
Patch 1.1: Special thanks to Travus (aka AhTravesty's Let's Plays) for the companion related fixes.
* Companion revival should now take place more reliably
* Companion revival animations should also look more correct/sharper
* Hopefully fixed an issue which prevented a post-battle cutscene conversation from firing in chapter 2.