Please, for the love of god, no more high pitched sounds.
The game's been headache-inducing enough already ever since half the weapon sfx were replaced with mk1 vanilla stuff that sound like someone's smackin a rusty metal bucket with a rusty metal fork. I'm all for getting rid of that skypecall cloak sound (I've replaced it client-side already), but go with something not as high pitched. \DATA\AUDIO\SOUNDS\FX\sh_no01.wav works well enough. Just go with something similar to that.