[RMVX ACE] HELP WITH ABS

For my game, I'm using Khas's Sapphire ABS IV and I've gotten to do what I want with one problem. I can't seem to make it where states are inflicted, more specifically I want it where an enemy attack or skill could poison the player and the other way around too. Is it possible to do this using Khas's Script, if not would anyone on here know how to write an add-on or a change to the script to allow poisoning?