hmm.. it's like this: Find a voice commands of the some unit (the one you will never use, or will w/e), you can find that in Sound Editor. For example Sound Editor - Units - Arthas: and there you see things like ArthasPissed, ArthasWarcry, ArthasWhat, etc. Now if you want to use some other voice command. Find some voice commands, import them via Import Manager. And the click on Arthas sounds, replace every sound (Replace Internal Sound) with the ones you imported. When setting a unit that you want to have the sounds, you the use Object Editor - Your Unit - Sound - Unit Sound Set - and you set it to Arthas, or whatever unit that you changed the voice commands.