I don't remember the details, but I think the problem is getting the dark skeleton models to show up at all. They originally had problems with just getting them off being the Luclin models I think, but then couldn't get the correct textures.
A quick search got me these threads, I'm sure there's more if you want to dig:
http://www.project1999.org/forums/sh...ad.php?t=13559
https://www.project1999.org/forums/s...ad.php?t=39626