That should be easy enough, tattish, to get enemy sound effects. For example if you had a sound you wished to play when the enemy sees the player, open the enemies default .fpi script, and find the line:
:state=0,plrcanbeseen:state=1,settarget
And simply add on: ,sound="C:\Program Files\The Game Creators\FPSCreator\Files\audiobank\nameofyoursound.wav"
This means the line of code will now be:
;state=0,plrcanbeseen:state=1,settarget,sound="C:\Program Files\The Game Creators\FPSCreator\Files\audiobank\nameofyoursound.wav"
Tom