Need help making custom sounds

[Amnesiaplayer]

i want to add my custom music...
and i see in one enemy (custom)
that he have 30 ogg files and some SNT can i erase it ALL and add 1 ogg file (and snt) ?
because i want a monster without music , (maybe i add some talking things)
i'm going to use a music , that the music don't say anything but when he see you (chase music Starts) and he will chase you.. so is this possible ??

oopss wrong one :S