Thank you very much c: I was able to extract the files from msg.dat using the FAFULLFS script but I'm afraid there are no battle voice files, I opened lots of them with Audacity and I only found and heard story voicelines and other audios, but not the battle ones.
I think they are located in voice.dat instead (same directory as msg.dat) and FAFULLFS script was able to successfully export the files from voice.dat! But Audacity won't open these .nlsd files even though it had no problems opening the ones from msg.dat, which are .nlsd files as well.
Thank you again btw
I'll let you know if I'll be able to open them!