Ah! I suppose I forgot the CFG. Are you saying that I should place the items cfg in the items folder ?
There was a tutorial in the .zip, but I followed it to pretty much a T and still it refused to work. As I am also not using a computer, I can't give you the exact way I was told, but I can give you the gist.
Copy+paste the meshes, textures, and material file in the .zip into the items folder(they didn't have folders when I pasted them in, so I created them later After my previous attemps)
Use notepad (i used notepad++) to change the cfg with the copyied text in the readme(provided in the .zip)
After I followed those instructions I still couldn't get them to work. So I guess I started to waste my time getting them to show up in the object maker. But I fooled around for more than an hour trying to get em' to work, unfortunately.
When I downloaded and unpacked their .zip the horns's textures and related items were all in a huge lump, not in seperating folders. Maybe I messed them up somehow by putting them in the folders later ? I'm pretty sure they're older items as well. So maybe the way feral heart's item system changed since the tutorial in the readme.
Haha, sorry for the huge blocks of text! I can also provide you the tutorial later when it's available.