As far as I know, you need one of those flashcarts (R4, M3 Simply, Supercard) and you also need a media software (I think "moonshell" could work, but just to make sure, why not google it?) After that, all you need to do is run the movie through a converter (like DPG tools), chuck it in your card, and voila! PS: yeah, I'm not very good at explaining things :-X I did a google for ya' and this is what I got. It should explain things nicely. http://www.themanfromdelmonte.co.uk/nintendo-ds/nintendo-ds-moonshell-dpg.htm