OK I personally have never tryed those NL1 files. So what is your goal?
I would install the NC2 firmware (I have used these many times).
If you want root NL1 you can install tr.apk an busybox then safestrap , then use the NL1 recovery installer I posted, or use muniz_ri thread to istall his moded NL1 ota zip
[How-To] Update to N900A_NL1 - 4.4.4 and Keep Root (12-24-2014)