Prophawk,
If you have done things correctly, your sounds folder in the Aces High directory will now be full of various *.wav files. If not, you have not installed the sound pack as intended.
The default sounds in AH are not visible as *.wav sounds so what happens is that the files you place in the sounds directory are used in preference to the default sounds. The sound pack files have indicative names like "stall.wav". This sound file is for the stall warning buzzer.
So far as I am aware you should not have two AH directories, so perhaps you should query this in the technical support forum.