I have a problem. Let’s say I want to add a script to an object in my scene, but I have 20 of those in my scenes. OK, not a big deal. Yet, what if I have 35 scenes where I have to do that? Certainly a problem!
Is there some editor script/method that lets me iterate through all the scenes refering to gameobjects and allowing me to change them?
make all objects prefabs so they can be edited outside of a specific scene, and then if you want automation for the editing process Look up editor scripting and build a little plugin to do it for you, these links can get you started:
http://unity3d.com/learn/tutorials/modules/intermediate/editor/building-custom-inspector?playlist=17117
http://unity3d.com/learn/tutorials/modules/intermediate/editor/drawdefaultinspector-function?playlist=17117
http://unity3d.com/learn/tutorials/modules/intermediate/editor/adding-buttons-to-inspector?playlist=17117
But yeah if you want to change an object outside of scene, make it a prefab, then you can edit the prefab and every scene containing the object will update its values to match