Hacking Nsp Repack (game info and icon change)

LegoSuperMarioSonicMoon

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Hello to anyone who reads this. I'm interested in repacking nsp, particularly changing icon and game info. I already know that sys ticon exists. But it is module that runs in background, which is awful considering I can't get applet to work. Plus it doesn't entirely work global. And for emulators too, best thing would be actual changes inside of rom.
I tried repacking with hactool and hacpack but it seems to fail after installing it, eden stays that metadata is still asking for old control nca file. How do i make a proper new cnmt.nca??
Please help
 
解包nca 带nacp文件是游戏名称 里面的icon是图标 原图片建议jpg格式然后改文件名为dat 不超过100k 修改好在打包就行了
 
英文 (English)
"Unpack the NCA file. The accompanying NACP file contains the game name, and the icon folder contains the icons. It is recommended to use the JPG format for the original image, rename the file extension to .dat, and ensure the file size is under 100 KB. Once the modifications are complete, simply repack it."
 
I'm also interested in this since all my custom icons have stopped being displayed since Firmware 20.0.0 or something, I'd love to be able to change them directly in the NSP file.
 

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