This is Brooke, a companion with a story which I hope to expand on over time

There may be a problem with her story dialogue after you hire her, you should see "What's your story then?" if you don't see that after hiring her, save your game, quit to menu and reload and it will be there. It's a bug with creation kit which Bethesda so far hasn't fixed.

To install

Just manually copy and paste the files into your data folder.

You will find Brooke at the Inn in Rorikstead.