I have a crossbow weapon based on the dartgun model. It seems the dartgun uses the same reload sound as the laser rifle, which has that kind of electronic charging noise at the end.
That sound does not fit a primitve crossbow, but unfortunately I cant see anywhere on the GECK that this can be changed.
So my question is how do you change weapon reload sounds?

I think the reload sounds are tied in with the weapon reload animations, which unfortunately, the animations cannot be changed in any way as they are mostly hardcoded.

Ah, that is as I suspected (and feared).
I have edited out the electronic noise at the end of the laser rifle reload (reload B) but I would much rather be able to just use a different sound.

To use a different sound for reload:

1. Figure out the path of the sound that you want to replace. In this case, after you unpacked the .bsas you would see the dart gun reload sound is in data/sound/fx/wpn/dartgun/reload

2. Make sure your replacement sound is in the right format and isn't longer than the entire reload anim

3. Put your replacement sound with the same name as the original sound (wpn_dartgun_reload.wav) in the same place as your original sound would be, if your .bsas were unpacked.

4. AI

It works the same as texture replacement.

And the weapon anims can be changed at will, for someone with a little know how.

The only part of the weapon anims that is hardcoded is the name and number of the animation slots.

Exactly. I dont think he wants to replace an old sound, he wants to make a unique animation with its own sound, leaving the default alone. This cannot be done, because there slots are hardcoded, and I dont think they can be changed. (Possibly fill and open slot if there is one?)