First post here. Wanted to add some things to PM, but couldn't get the PMUB character SFX to work. Got PMDIY yesterday, but can't seem to add characters. I'm using hackless 2Gsd and have no idea what I'm doing, never modded anything before

I seem to be too thick for the tutorials... That is, which of the GCT is the CSS stuff that I should change to add slots?
plaintext signature, GO!