How to play music and put custom image on DSi

In case you wondering why i don't use screen recorder in my PC like OBS etc. because my screen recorder is bad because i am using bad GPU. so subscribe to help me

Links:

DSi Jpeg Signature Tool https://drive.google.com/file/d/17Bo8MHgjsyfGYOVWBpOUiYxJUNfjKgcZ/view

iPod homebrew https://www.gamebrew.org/wiki/LMP-ng

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