@all: google for dalek, you will see that you dont need animations for this
i loved dr.who.^^
once i build a flying 2d-shooter-satelite out of a vickers-gun.x and -texture set into a copy of a dark-ai-character.fpe.
then gave a vickers as weapon and ready to go.
its the same principles, so i think you can do the same with your model when you get it into a .x-file.
gunsound:
build a copy of a stock-gun-folder and exchange sound to the one you like inside the gunspec.txt (guns are in the gamecore-folder).
could be that you have to calibrate sound with firerate if sound doesnt fit into muzzle-rate (change firerate or length of soundfile).
there you can also change the muzzle/shine, but therefore you have to ask another one

. then simply set that weapon as the char-gun.
exterminate-sound:
simply insert the following into the actionlines of your behavior-script(-copy) where you want to get shouting (right before something like "shootplr"):
,sound=files/soundbank/.../exterminate.wav
so the full path of the soundfile from files-folder. you have to use .wav instead of mp3.