I had this mod for a few months before the new update to FeralHeart. It was very well made and I'd love to see a new version that worked with the update.
Parts of this like music and GUI should work with it to be honest.
The only thing I do not think that would might be some of the terrain textures and the fact that the updated added a few more splash screens than what I drew my self originally. But as I said the rest of the GUI stuff should still be compatible as its just a texture override for GUI. (to get that to work just drag all the GUI textures into the textures folder)
But then when I get the time, I do want to go back over this and sort it out to be easy to set up again and working fully, terrains and all. As it was after all an awful lot of work the first time... so I'd like for people to still be able to use it I think.