Helmets are hard. This one is kinda tricky because the way the helmet looks in Nifskope (position, orientation) isn't how it appears on the character. I've tried other meshes, and nothing works out very well, but I'll keep fiddling around.
Ah, I know nothing about working in Nifscope, so seeing the problems, consider my idea null and void
As for the cloth - I made the color match the orange spots on the clannfear back texture. I wanted something that looked like something someone would wear, rather than turning the player into a scaled clannfear wannabe. Hence the leather textures for the greaves underneath the clannfear hide.
I think if it was in the color of thet leather, it would make the armor look more like a set - apart from those small spots, it doesn't match the armor.
If someone is able to lop off (isolated mesh) just one of the clannfear horn-spikes on its head, then I can take care of sizing, cloning, and positioning them on the armor.
I know nothing about working with meshes, so it's a shoddy job - but perhaps you'll be able to use http://www.mediafire.com/download.php?4pcac1v5hf65g4l.
And Karpik, clannfear do have spikes on their heads. I used the same textures for my spikes, too. They also have claws, but those use a different textures. I don't know why Bethesda made the feet claws use a green texture, though, that's just weird. I agree, the spike shape doesn't match. Think of it more of a proof of concept.
I know - but as you said, the shape doesn't match, so they don't remind me of the clannfear (thus I prefer the spikeless version to the one with those spikes). Hmm, I'm curious how would a neclace of the green claws look as a part of the cuirass... ;P