Remade the whole thing since i had nothing else to do.
Tested it a bit and seems to work fine tho i am limited to PODBots but through testing, the zombie will go invisible when crouching and will emit the sounds set. The human does not seem to go invisible anymore after death or round end. Let me know tho!
Tested it on
Zombie Plague Shade mode and worked just fine.
Not sure how optimized this plugin may be.