Plutonium

I'm guessing some of files will overlap/not work if i put all of say, new menu screen from the nilou + sage folder. You can only use one at a time, is what im asking/I cannot dump all the files into bo2 right?

I'm guessing everything is in folders for knowing what something is but what are dds files, are they needed, same with the desktop.ini? I am mostly asking if things need to be manually merged within the desktop.ini instead of having just one file name