How to Download DS game ROMs on DS multimedia cards
First open up the Google and search there for Romulation. Now click on first link it will take you to the website. Now type the game you want in search box like ice age 3. Platform must be DS. Now check the comments before downloading and if you satisfied then download it. Now open your game but you will need WinRaR to open it. Now extract it. And now insert your SD card reader in your computer and copy the game in it. Now remove it and insert the SD card into your DS and turn it on. Now you can play your game.