My latest kontakt library I've acquired uses ncw files and I have never heard of them. No library is found either when I try to add the library. Nothing shows up either when I try to load a patch manually.

 

ncw = Kontakt Compressed Sample.
To add library in Kontakt you need _info.nkx or _info.nicnt file in the main directory.

You cannot load ncw directly, you need to load patches with nki extension *yes*