There are two downloads included.   1. "Immersive Hair Growth and Styling Voice 6x.7z"  - is a regular Voice Pack with the voice files for NPC characters. No requirements beyond the "Immersive Hair Growth and Styling Skyrim"-mod. Comes as a BSA archive with dummy esp (esl flagged) to facilitate faster loading times. Copy Archive 001 and 002 into a folder and unpack Archive 001 using 7-zip. It contains the esp and bsa file. Then create new archive using that newly created folder and use