Adding a New Sound
One of the least used features in mods, next to improved AI, new sounds
aren't commonly heard. Let's see if we can change that.
Open XCC Mixer. Go to Launch > Sound Editor.
Now, drag and drop the sound you want into the Sound Editor.
Click OK to save your changes.
Now, open sound(md).ini. Add your new sound to the list.
xxxx=YourSound replacing the x's with the next number.
Make your new sound entry.
Sounds= yoursound1 --> change to your actual sounds
Volume=85 --> change to suit your needs, but that's a good number
And there you go. A new sound plays in the game!