[pkscout]

I found the lines in the XML you mentioned, replaced as suggested, but the result was: a black background at fullscreen mode (music playing). I kind of threw my hands up a bit at this point. Your add-on is great though and it takes a lot of focus, skill and care to make something which works across different variations so I hope others are benefiting, I'm sure they are, from your work.

That probably means the resulting XML file was invalid. I didn't actually test the update, I just looked through the skin code.  There might be something in the debug log that would identify where the XML isn't valid, but you're honestly probably better off getting help with the mod from the folks using/maintaining it.