Grenade "Placed Object" location relative to player?

[JinBokou]

I'm trying to make a grenade that no matter where you throw it, the "Placed Object" part of the explosion will be a few feet behind the player.

 

I still want a visual effect where the grenade actually lands, but I want to add a summon that will spawn behind the player so you don't see them magically appear.

 

I tried looking at the pack scent grenade but it uses quests and scripts that are way too complicated for a newbie modder like myself, so I'm hoping to find an easier way to have a similar function.