Can't Find Custom Story Editor

[Leopard9250]

You can download them as well as view tutorials to use them on the wiki:
http://wiki.frictionalgames.com/hpl2/tools/start
To install, simply extract it to your redist folder (the folder containing Amnesia.exe)

I'd also suggest viewing the "Noob to Pro" creation series done by Your Computer:
http://www.frictionalgames.com/forum/thread-10798.html

Both of these resources should get you well on your way to the fame and fortune of Amnesia mod creation!

Thank you very much!