Installation/Setup
1) Download the required files .
2) Insert your Micro SD/SDHC (Not included in the M3i Zero bundle) card into your T-Flash Card Reader (Included in the M3i Zero bundle) and insert the T-Flash Card Reader into a open USB port on your computer.
3) Locate the drive the drive in the My Computer folder, right click it, and select Format.
5) Remove the Micro SD/SDHC card from the the T-Flash Card Reader and insert it into the M3i Zero adapter.
6) You may now connect your Micro SD/SDHC card to the computer again (As you did in step 2) and place your media on to the card
7) Reinsert the Micro SD/SDHC card into the M3i Zero Adapter and you are ready to play as though it were a normal DSi game.
Refer: http://gbatemp.net/index.php?showtopic=202869