here are the things need it:
first you need a passkey2 or the new passcard2 that works with all the DS even the lite version, this pass is like a chip for the DS, you can buy a pass or
flash your firmware, and then you save battery time, but you still need to buy a pass for flash you DS for first time
you need a a M3 SD or CF adapter, i recommend a M3 Perfect Mini-SD adapter, and Mini SD / SD memory module where you put the games
then you need a External memory card reader / writer, like
Zonet memory card reader/writer, this one is for transfer the games to you Mini SD memory
i think that this is all the things need it, all can be buy here:
http://shop.01media.com/
Jam it back in, in the dark.