This is kind of hard to describe, but I'm basically wondering how I can make the changes that certain quests make to the game world without actually doing those quests? For example, I'm talking about restoring the Gildergreen so it already has its leaves or killing Ulfric and placing Windhelm under Imperial control without doing the civil war quest line. This is really just for personal role play consistency, so that it gives the illusion that the quests I do as one character affect the world for my other characters. Hope this doesn't sound stupid, but I know some mods like Skyrim Unbound do similar things.
I know that when I open Whiterun in CK it shows damaged buildings and catapults like during the battle, as well as multiple variants of the Gildergreen tree placed in the same spot, which I assume is so the game can switch them out when it needs to.