You see, a soundset is attributed as a folder. In those folders, the wav files have the same names. Make a folder like that and add the wav files. Rename the wav files corresponding to their individual purposes. There should be 7 sounds per soundset.
Filenames:
'finalmoan.wav' = death
'hurt1.wav' = random hurt sound
'hurt2.wav' = random hurt sound
'hurt3.wav' = random hurt sound
'land.wav' = landing sound
'leap.wav' = jumping sound
'spawn.wav' = spawning sound
The easiest way to achieve a custom player soundset is by replacing the default wav files. I hope that helps.