ROM Hack How to convert .3ds to romfs.bin?

[Deleted member 414661]

Hello guys, I have the .3ds file of Monster Hunter Double Cross on Citra and am looking to edit some smallish stuff in it, nothing truly game breaking. I have a hex editor (HxD) ready to use, alongside the MH Mod Tools and Python 2.7 installed.

Problem is, the Mod Tools require romfs.bin as the base game file to unpack and edit things. How do I convert .3ds to romfs.bin?

 

[Ryccardo]

1-command extraction with ctrtool:
ctrtool file.3ds -n 0 --romfs=romfs.bin

 

[Deleted member 414661]

1-command extraction with ctrtool:
ctrtool file.3ds -n 0 --romfs=romfs.bin

Ok, found and downloaded ctrtool but when I try to open it a window briefly flashes in and out of existence on my screen and nothing stays up.

 

[Dionicio3]

Ok, found and downloaded ctrtool but when I try to open it a window briefly flashes in and out of existence on my screen and nothing stays up.

You need to run it from cmd

 

[Deleted member 414661]

You need to run it from cmd

Okay, how do I do that? It's been literal years since I've ever needed to run anything that way.

 

[Dionicio3]

Okay, how do I do that? It's been literal years since I've ever needed to run anything that way.

Open cmd, CD to wherever you have ctrtool and you ROM, and follow what @Ryccardo posted

1-command extraction with ctrtool:
ctrtool file.3ds -n 0 --romfs=romfs.bin

 

[Deleted member 414661]

Okay yeah I'm REALLY dense regarding command line, the program folder is on my desktop and idk what exactly to write in cmd to open the program. Can someone be kind enough to tell me exactly what command I need to write? I tried doing "start ctrtool" and "start "ctrtool.exe" and neither worked.

 

[Dionicio3]

Okay yeah I'm REALLY dense regarding command line, the program folder is on my desktop and idk what exactly to write in cmd to open the program. Can someone be kind enough to tell me exactly what command I need to write? I tried doing "start ctrtool" and "start "ctrtool.exe" and neither worked.

You don't need to type "start" just copy and paste the command ryccardo mentioned

 

[Deleted member 414661]

Okay, I just typed:
"ctrtool Monster Hunter XX (JPN) (RF) v1.2 English Patch v4.3ds -n 0 --romfs=romfs.bin" and it said it did not recognize ctrtool as a program or command.

 

[Dionicio3]

Okay, I just typed:
"ctrtool Monster Hunter XX (JPN) (RF) v1.2 English Patch v4.3ds -n 0 --romfs=romfs.bin" and it said it did not recognize ctrtool as a program or command.

You haven't CD'd to the directory

I recommend googling the basics of using the command prompt, it will help you a lot with this

 

[Deleted member 414661]

You haven't CD'd to the directory

I recommend googling the basics of using the command prompt, it will help you a lot with this

I just need to know what two commands are that I can save in a Word Doc on my PC and type them in exactly when I need to use them. Can you please tell me exactly what I need to type for this? As you can guess I know next to nothing about programming.

 

[Dionicio3]

I just need to know what two commands are that I can save in a Word Doc on my PC and type them in exactly when I need to use them. Can you please tell me exactly what I need to type for this? As you can guess I know next to nothing about programming.

If you know nothing about programming may I ask why you require a romfs.bin?

 

[Deleted member 414661]

If you know nothing about programming may I ask why you require a romfs.bin?

I'm just trying to edit one .3ds game I have for the Citra emulator. I used Python cmd stuff several years ago to decrypt and re-encrypt the save data for Monster Hunter 4 Ultimate and someone on a forum like this just told me what to type.

Just looking to do a couple very small edits and nothing more. No real need, problem is I need a romfs.bin of the Monster Hunter XX game file and I have a .3ds file currently. All I need are a pair of commands to create a romfs.bin from it and another to turn it back into .3ds when I'm done.

--------------------- MERGED ---------------------------

Or better yet, what sort of converter program could I find that doesn't need command line to work?

 

[Dionicio3]

I'm just trying to edit one .3ds game I have for the Citra emulator. I used Python cmd stuff several years ago to decrypt and re-encrypt the save data for Monster Hunter 4 Ultimate and someone on a forum like this just told me what to type.

Just looking to do a couple very small edits and nothing more. No real need, problem is I need a romfs.bin of the Monster Hunter XX game file and I have a .3ds file currently. All I need are a pair of commands to create a romfs.bin from it and another to turn it back into .3ds when I'm done.

Okay you need to type "cd <full path of folder>" then run ryccardo's command

 

[Deleted member 414661]

Okay you need to type "cd <full path of folder>" then run ryccardo's command

Okay I typed:

>cd C:\Users\Jason\Desktop\Windows_x86_64\ctrtool.exe Monster_Hunter_XX_(JPN)_(RF)_v1.2_English_Patch_v4.3ds -n 0 --romfs=romfs.bin

And it said the system cannot find the path specified.

 

[Dionicio3]

Okay I typed:

>cd C:\Users\Jason\Desktop\Windows_x86_64\ctrtool.exe Monster_Hunter_XX_(JPN)_(RF)_v1.2_English_Patch_v4.3ds -n 0 --romfs=romfs.bin

And it said the system cannot find the path specified.

No type the cd command first, then press enter, then type the other command

 

[Deleted member 414661]

No type the cd command first, then press enter, then type the other command

Okay I typed in just the first part and it said the directory name is invalid.

I typed:

cd C:\Users\Jason\Desktop\Windows_x86_64\ctrtool.exe

 

[Dionicio3]

Okay I typed in just the first part and it said the directory name is invalid.

Remove the "ctrtool.exe" from the cd command

 

[Deleted member 414661]

Remove the "ctrtool.exe" from the cd command

Okay, now it shows:

C:\Users\Jason\Desktop\Windows_x86_64>

Now I type the stuff Ryccardo posted?

 

[Dionicio3]

Okay, now it shows:

C:\Users\Jason\Desktop\Windows_x86_64>

Now I type the stuff Ryccardo posted?

Yes