Riivolution and Voice Packs

[Kagato]

I'm trying to use Riivolution to load certain voice packs for individual characters. For example, I downloaded a file containing Bowser's Galaxy and BiS voice, but I don't know how to make a sound file out of that.

Also, I know that Riivolution can load new voices since there's a Lucario -> Mewtwo hack on Brawl Vault that does it for the announcer calling Lucario Mewtwo instead.

I saw that hex editing is required and that VILE made a guide, but I have no idea where it is.