It's just a function for the nick list popup menu, for setting access lvl 3(voice) 4(halfop) or 5(op). Put it in Popups under Nick List. Like i said it's very simple, because this is the first snippet i've submitted.

Access
.Voice:/cs access $chan add $$1 3
.Halfop:/cs access $chan add $$1 4
.Op:/cs access $chan add $$1 5