Bug Fixes have been released, and the diary at the beginning has been altered, because I realized how generic it was, and how much of an awful story it told.
This is part 1 of a 2-parter custom story, I'm sorry that Part 1 is short and features on a Kaernk chase, but listen. If you like being chased down or hiding from monsters, then Part 2 might be your favorite part of the custom story.
Instructions to install: take the folder, go to 'C:\Program Files (x86)\Steam\steamapps\common\Amnesia The Dark Descent' and put it into 'custom_stories', and presto it's installed.
Worth it just for the voice acting.