I have another guide for you! Basically, it's a breakdown of how the default RPG Maker programs read the graphics off the Window's UI sheet. I'll expand on this one later for RPG Maker MV and 2003.
I hope you find it useful!
(*It's a little hard to see the download, but please click on the file icons below the title pic to get your sprites!)
This guide and template will be made available to the public on September 24, 2016.
*You can find my other guides and tutorials here: