The files should go in EvochronMercenary/music/ - create the music folder, if necessary. Then it should be good to go. To revert back to the original soundtrack, just delete the music folder (or delete those particular files from it)
The music changes from "No threat" to "Medium threat" to "High threat (Combat)".
You always need blocks of 3 tracks. No more/No less.
In the music folder it should look like this:
musiclevel1-1.ogg
musiclevel2-1.ogg
musiclevel3-1.ogg
musiclevel1-2.ogg
musiclevel2-2.ogg
musiclevel3-2.ogg
If you divert from this layout, it wont work.
Hope this helps a bit.
\"Nothing is impossible, it only takes a bit longer!\"
\"We are not retreating, we are advancing in another direction!\"