it should look like this, this is the uncompressed cht_ms001.chd, the green box at offset 24 (in every file) shows that the file type/signature is at 172, so you have to type chtd when repacking. feel free to ask if you have any questions
edit: sorry i forgot to post that this works with uncompressed files
edit2: for repacking files we could try the leaked cri file manager, but i don't now if it's ok to distribute it. It uses the same compression method, so if you make a custom cpk then extract it while keeping compression you have a compressed file. i haven't tried it yet, just an idea.
today i tried to make the trophies to english, i extracted the US TROPCONF.SFM (the file where trophy names and descriptions are), made a custom one with keeping the JP trophy signature and id (first and third line) but using the US trophy titles, and I copied this file to /home/<numbers>/trophy/npwr01205_00/ but it looks like there is a trophy cache somewhere, as the trophies didn't change.
anyone knows something more about the trophy files? Alternatively, i could try making another repacker (ugh..) but then the trophy data must be reinstalled.
mamu, first delete the trophy file and then load the game you should get an error and the trophy will be gone, no replace it in the game folder and load the game again to install the new modified trophy set.