I'm pretty sure the .nkx file is written by the library itself upon creation if it's not already present.
@he_man2003 - I'm using v5.02 @jack - you're welcome!
I have managed to create libraries in Mac using the above method and Plist Edit Pro. Make sure ALL the names in your directory match the names in...
I'm not sure if this is a thread referring strictly to Windows, but I have successfully learned how to make my own Libraries in Mac (Intel, Lion)....
Separate names with a comma.