Ohhhhh...
Sprites.ini doesn't define sprite locations, it defines what they are.
Wow, the degree of level editing in this game is much greater than KS!
Alright, so I'll be writing about all the following:
For the episode:
Galaxy.ini
Credits.ini
For a solar system:
Star.ini
For a planet:
Objects.ini
Planet.ini
Sprites.ini
For a cutscene:
Objects.ini
Planet.ini
Some of these might constitute the need for separate threads, though. It doesn't seem logical to have a guide that involves all the .ini's, because they all have different times when you would use each one. In fact, the cutscene .ini files might not deserve a guide at all; instead, when somebody writes a guide about Cutscenes, that guide should integrate details on how to appropriately edit the two .inis associated with it.
Nonetheless, I'll start taking notes now. When the time comes, I'll find a logical place for everything, or I'll share relevant notes with people writing other guides.