You have to UNPACK it to a folder, and then open its files with the tool. NDS Editor is a good program to unpack .narc files.
EDIT: I've got a Move Permission Editor working, although it has saving disabled for now. Here's Route 202 in it:
The colours for each permission are stored in a text file and they can be changed to whatever you like the most. The Buildings Editor will have a map viewer similar to this one, but smaller