Actually, with issues arising from their dealextreme server being on USA soil, they were threatened to be shut down if they continued to sell that product. So, they outsourced it to these guys (basically same dudes, except server is located elsewhere).
http://www.volumerate.com/details.vr/sku.1202Ingredients required: R4 DS, microSD card, and computer
R4 is very easy drag and drop. Just download the "operating system" from here :
http://gbatemp.net/index.php?download=858Drag the entire contents into the root folder of the microSD card.
Drag the ROMs of the games you downloaded into the root folder (don't overfill since a SAV file will be created for each gamesave and going over will corrupt your microSD card)
Fire up your DS Lite and kick yourself for not getting one sooner. Easiest "mod" ever.
If you want to, you can even download "themes" to change the look of the user interface here:
http://www.ndsthemes.com/Somebody else want to step in and explain how to work moonshell to play MP3, watch movies, and open ebooks using the the R4 (since I've never done it)?