ROM Hack Help rebuilding GBC-VC CXI file?

[TeleTubby666]

Hi,

I got a limited edition of a 3DS game bundled with an english VC-version of "Zelda - Links Awakening" via eShop that is now installed for years on my 3DS.

My plan is to extract the installed version of the rom, replace it with a german version and rebuild it so that you don't see any changes "on the Surface" with only the rom file replaced.

So I identified the installed .app on the SD card, decrypted it via GM9 getting a CXI file which I extracted via HackingToolkit9DS getting these files:

exefs.bin
extheader.bin
ncch.bin
plain.bin
romfs.bin

Extracting the romfs.bin gave me the following contents:

<DIR> ErrLang
<DIR> lang
<DIR> rom
<DIR> shaders
<DIR> snd
agb.bin
buildtime.txt
config.ini
Dmgazlp2.f61.patch
ErrLayout.arc
face_cgb.ttp
layout.arc
shader.shbin

In the rom folder I could identify the rom file easily and replace it with the german version, changing the file name to its original one:

1.048.576 Dmgazlp2.f61

So far so good. So I managed to rebuild the romfs.bin with the swapped rom file giving me a new one with the exact same file size.

My problem now is to rebuild all these files to a new CXI file that I can Import into the .app file via GM9.

Can anyone help me please?

Thank you very much in Advance!

 

[botik]

To make it work is also necessary to change 00000000.tmd(sha256hash has changed) and perhaps 00000001.cmd. Better create from <cxi> file <cia> and install in the console