Hacking Homebrew NDS R4 _DS_MENU.dat

[iarron]

I'm a tech savvy R4 noob that just purchased the R4 wood gold SDHC 2024 cartridge and I'm trying to amend the _DS_MENU.dat file.

The only thing I've managed to find is a thread within this forum from 2007 referencing a user named 'chishm' who has designed a program that can decrypt and encrypt R4 .dat files. However all of the links on this forum were dead ends, I did find a .zip download on gamebrew.org which has r4crpyt.exe, but I am sceptical when running exceptionable files on my device and given that this is 18 years old I'm assuming it may not work.

Does anybody have any experience in modifying these .dat files?

 

[RocketRobz]

r4crypt will work just fine.
Also, what exactly are you trying to do with the .dat file?

 

[iarron]

r4crypt will work just fine.
Also, what exactly are you trying to do with the .dat file?

Thanks I will run r4crypt. It's mainly for customization, as it's for my son who is just getting into video games, I want to be able to edit the game cart icon and name on the main DS screen and make it easier for him to navigate the menu. I also just have a general interest in things like that, whenever I get a piece of software I like to take a copy and pick it apart to see what I can do and how the files work.