Hi Game Designer
By right clicking, I'm assuming you mean the Player Start marker? I hardly see any "code" there, that was the first thing I looked into. Even after leaving the soundset blank, it still didnt remove the footsteps (just the grunts when you jump and the other sounds).
I also replaced some of the material sounds in the audiobank folder (in what seemed to be the footsteps) but when I test the game, I can still hear them?
It would be cool to work on something together but I'd doubt I'd be of any use to you, unless you need audio/music. My knowledge of FPSC is very limited.