How to change in-game champion voices: ALMOST DONE, will make a guide, but need your help to fix all

As the title says, i'm THIS CLOSE to make local champion in-game voice a reality. Infact, i managed to replace Annie's voice with my own files (in my case, dota 2 warlock voices). Well, at least partially. DISCLAIMER: i know sound-modifying is not supported by Riot and can break the game, but i always back-up and be safe, so don't worry about that.

Here's what i did in short:

Got my files (mp3, ogg, whatever) Got Annie's VO wpk file from the game's folder, and extracted it with WPK Packer Converted into wems my own files thanks to WPK Packer Renamed EACH ONE of those files exactly like the original wems in the original Annie wpk (shit was tedious, the file names were a bunch of numbers) Saved the new wpk and renamed it as the original, then replaced it

Now, Autoattack, Joke and Death lines all work perfectly, the others are just silence. What could i have got wrong? Why some lines work fine IN GROUPS (All the AA ones work, same for jokes, but EVERYTHING ELSE doesn't)? I suspect the bnk "event" file could be useful to fix this, but how do i open/modify it? Google leads me to dead sites/downloads.

If someone (a red post could be useful if the red answering actually takes care of sound patching or is related to sound-making in LoL) could give me a hint on how to fix this (so that ALL the lines work and not only Groups of lines) i'd really appreciate it.

Thanks in advance, and ask for more info if you need it. Once we manage to get this to work, i'll write a guide about how to do this.