This as an Aliens sounpack.  Have a model that you'd like to sound like the Alien?  Just unzip this into its directory and it will.  To my knowledge, all the sound in this pack are directly from the movie itself.  Note by the way that all these sounds were ripped from a certain FOXED Quake TC that shall remain nameless. 

Meanstryk
Ramshackle Level, Bot and Demo reviews
http://www.planetquake.com/ramshackle
 