suet,

THAT or a passkey device. Its a "homebrew" application so the DS encryption validation needs to be bypassed and passed to the GBA cart.

myliew,

Moonshell is operating in DS mode, whereas the SC movie player is meant for GBA. Therefore the Moonshell one works much better

To get it to work, just put moonshell.nds on your SCSD and put your mp3s on the SD card. Same goes for pictures, oggs, text files etc.

However, if you want to play movies they need to be converted first.