ROM Hack NDS Filesystem and how edit it?

[TyRaNtM]

I have problems trying to unpack some filesystem, like this:

- .NARC: I can't open with NARCTools or other programs, is like that the .narc isn't a .narc.
- .ZARC: What's this file? Is in Phantasy Star 0 is.

 

[DarthNemesis]

If the first byte in the file is 0x10, it's using LZ77 and needs to be decompressed first.
For PS0 specifically, many files are encrypted and therefore unreadable - these files have a ZPR signature.