Dragon Age Inquisition add item to store or prologue

[WZCC1993]

 I downloaded   MrFozzyMotto store mod where there are items in a store that change the appearance of another thing. For example Solas’s wolf armor has been changed to the appearance of his armor in Trespasser. It even adds a basic armor named vestments of rebellion showing Abelas's Armor. I was wondering can I do that to a weapon. I want to change the Longsword of the Dragon into the appearance of The Dragon Sword we see in the execution scenes. The thing I am trying to do as a whole is transfer the save over to PS4. It's replacing the appearance of another item but the thing that I'm trying to figure out is how in the world is it able to stay with the game even when transferred over to PS4. Because even when i transfer that save over to PS4 the appearance of Solas’s armor stays with it.