I wanted to provide a link to a sounds pack I made a few months ago. It contains over 100 different sound mods for AVP Classic 2000, and as always, all mods have been converted to the same file type to ensure fast and convenient swapping.

Download here: http://www.moddb.com/games/aliens-vs-predator/addons/universal-sounds-pack-v10

What are some examples of sound mods? Some of them change the alien, marine, or predator taunts. Others change weapon sound effects, or sounds of the motion tracker, cloaking device, shoulder cannon lock-on, and smartgun tracking. Others add different ambient environmental sound effects. A couple in particular are "movie mods" that add clips from the Aliens movies into various levels. I will be making a video tutorial on how to make sound mods for this game shortly.