When trying to write a small patch, I've become very confused about the origin of the components. This is a very simple setup, with only the fairly usual HD free DLC, followed by USkP. How does the CK indicate where each object, script, etc, is located?

Obviously, USkP is dependent upon (forces load) Skyrim.esm and Update.esm. Each change in USkP could be changing something in Update, which in turn is also in the base Skyrim. Other objects could be modifying the base directly. Some objects could be additions from Update. Further objects could be additions from USkP. We have many possibilities, even with this small number of files.

In turn, I'd like to know whether I'm conflicting with or depending upon the code in the other files, or could stand alone without Updates or USkP. Need some kind of indicator. A tree listing would be even better.

Moreover, I wish there was a way to list only those changes in each file, without the distraction of so many other loaded references.

Does this exist? How do other folks debug this?