As it turns out, there's no need to use the new one. Copying the core folder alone, which does include the program exe, seems to work just fine on its own. So far from the testing I've been doing, there seems to be zero issues with using the modified layout on the new core.
I would however respectfully suggest a change in the next update to make things a bit more dynamic. This is my first update of this program and I can already tell that if I want the newest features, I'll have to re-edit and rewrite the layouts for each update. If I'm being entirely honest, this may lead to some users with custom layouts to simply not update at all.
One of the biggest modifications I have made were to various icons such as player numbers, genre, and ratings. Most of them have been deleted and the rest were resized and renamed to reduce space and save sanity. There was a lot of confusion in there lol
You can see some of the things I've done in this Zip to show just how much has been altered that I'd prefer not having to redo each update.
EDIT: I realize that the icons for those are in a different folder, but the new layout update does not display them, and seeing as I have little to no knowledge of xml, what files have been altered took me a very long time to do and were done with pure guesswork. You can see the icons in the other zip.