This is a set of scripts that adds a Horror/Call of Cthulhu based custom Sanity rules to NWN.While these type of games did inspire me. Very little of the script is based on their systems. It is in beta so feel free to email me with questions suggestions etc. Please view the read me for more information. I would like to thank everyone at the Bioware boards for helping with this. Also the d20 modern guys for inspiring me. This has been rar up so you will need winrar to open it. I hope you enjoy.
Quick suggestion, it would make installing it a lot easier if it was just one .erf file. Also would be easier to incorporate into other scripts if it has a central include library. This would be better cos then you could add checks to other scripts e.g. onRest (bad dreams), onDeath, onDying, onPercieved (for nightmarish creatures), etc. If you need a hand with any of this stuff, email me or PM me on the bioware boards.
I think this would be a nice base for a possesion/split personality/"beast within"/hulk type thing. I can think of doing some nasty things to henchmen to scare the player.
With the effects, you may want to think about making them supernatural so they can't be dispelled or rested away. And maybe use the default fear effect to temporarily flee.