I have managed to put together an installer with a working version of the mod now. I'm going to wait until I get the Spanish sound files until I upload it.
Meanwhile, I need someone to help me look something up, since I don't have the game with me over christmas and can't see for myself:
I need to know if all the sound files must be extracted and all the idx and dat files removed from the data\sounds folder when starting the game, or if it's enough to delete events.*, unpack voice1 and voice3, and leave voice2, music and sfx as they are? Can someone help me check this?