Has anyone done this with melee or ranged effect

Successfully implemented a one hit and done effect. Like, instead of poison effect lasting 6 rounds, it lasts 1 hit (or something like that.

I was trying to do it with remove secondary effect. I set the spell to a new secondary effect I listed in msectype.2da and then on melee I had it remove the secondary effect from original caster. That may not be the right target, or it may not even be targetable at all...which is why I am asking if anyone has done this.

Also, NearInfinity doesn't seem to be able to point to resources like DLTCEP can, or maybe I am missing something...