I dunno, you answered your own question within your post.
Q: Why can't it be that simple?
A: it's hard to say what exactly needs to be changed, as it's not a case of changing a line that says "version=5.0.1" to "version=5.0.2" to make it compatible. It really does depend on what was changed.
On top of not knowing what I need to change if it did need to be changed, even if I did know, say it was an addition to the 'settings' menu. How does that help me with figuring out what to change and how does that affect the skin? Are you saying that if the version update isn't going to affect the UI in any way, the skin should work?
The UI is the only thing I can imagine that could get in the way of a modification, if renaming didn't work.
Tony, I know that they have been renamed, but I wasn't aware just renaming the files is all that needs to be done because I tried it and failed a few times in the past.
But, thank you for the help, I got one to work.