Follow these steps to get LSDj working on your Nintendo DS.
Make sure you have a flash card for your DS.
Max Media dock http://www.youtube.com/watch?v=n8mmek7KLXA http://www.amazon.com/DS-Lite-Media-Flash-Memory-Nintendo/dp/B000ZTYD6S
R4 http://www.youtube.com/watch?v=0NDz9kbkHn8
Acekard http://www.youtube.com/watch?v=YtR-_EKz6UE&feature=related
Donate to LSDJ for full version of LSDJ, or download the demo.
Download a gameboy emulator for the DS.
Lameboy – http://lameboy.nutki.com/
GameYob – http://filetrip.net/nds-downloads/emulators/download-gameyob-05-f32515.html
Move the emulator onto the games area of your flash card and create a folder for your gameboy games on your DS. Move the lsdj.gb file into that folder.
Open the emulator from flash navagate to folder where gameboys are, select lsdj and make music.