comparePlus VS NotepadPP-VDF-Languages

All of that is to say, you may want to move the county and barony entries in the landed titles file anyways, either in a mod, or just edit the game files. Though I highly recommend creating a little custom mod for this, so your changes aren't erased. If there is a major update, and you are worried your changes will corrupt the game, you can always go back, with notepad++, and compare landed titles to the original. (Here's a link to the plugin: https://github.com/pnedev/comparePlus )

Compare should be available through the built-in Plugins Admin menu; alternatively, you can find it on GitHub

When you mean separating the script do you mean syntax highlighting? If you want to separate blocks of code you can use //[ and //] at the start and end of your code block. Then if you install the source VDF plug-ins for Notepad++ you can then collapse and expand your code blocks.