@Zerbu, the highlight is tied to the world description ID not the file name. So in theory if you update the existing 0xA680EA4B resource to specify a a new filename it should still work so not sure why it did not for you. The fact that the world disappeared entirely is suspicious so maybe there was an issue with how the resource was modified. When this new code is available, it should be more robust - the highlight will just disappear when an unknown world is encountered, however hard to say if it will correct the issue you encountered here.
@Harrison, I do feel that this is something modders can get working but it's definitely not a simple thing to do, so we'll see how it goes.
-SGMS
