Adding sounds

[Tycn]

Is there a way to add new sounds to a new weapon without replacing the original sounds? All the sounds seem to be sourced from Fallout3.esm instead of an outside directory, like textures.

 

[Tycn]

I found a sort of compromise - you replace one of the weapon sounds for any weapon (2d or 3d) with your new sound in the respective directory, then direct both 3d and 2d of that weapon to the unmodified one. Then you can direct the sound to the one you replaced in the .esp.