Scripting fatal errors?

[Rapsis]

But I'm using a sound already included in-game, I don't think I should change it.

Well, you could make a copy of the sound file along with its .snt, give them different names, and put it along with your other custom story files. That way you can alter them without any fear of messing with the main game.

Tried that, and the sound doesn't work at all now:

<SOUNDENTITY>
<SOUNDS>
<Main>
<Sound File="breathrun.ogg" />
</Main>
</SOUNDS>
<PROPERTIES Volume="1" MinDistance="1" MaxDistance="10" Random="1" Interval="0" FadeEnd="False" FadeStart="False" Stream="False" Loop="True" Use3D="True" Blockable="True" BlockVolumeMul="0.7" Priority="0" />
</SOUNDENTITY>

this used to work before; I'll try tinkering with it later, I'm going out.