I had that tool for a while now, however it doesn't quite work for DPP as narctool cannot unpack them, not even narctool p1 could.
I can't edit the contents of the .narc as I do not know the contents, that's the main problem, if I knew, it would be extremely simple.
Edit: I see text such as:
So I assume it's an encryption, even the hex makes no sense.