To use ARDS with a real DS game cart: 1. Put the ARDS into the DS card slot (slot-1) and boot up the DS. 2. When prompted, take the ARDS out, and put in your DS game cart. 3. When the AR software detects the game you inserted, choose your codes and press GO. 4. If you chose the option to save codelist changes, you will be prompted to reinsert the ARDS. Once the changes are saved, you will be promted to reinsert the game card. You can add/update codes using the PC software and a USB cable. And no, it will not work with a flashcard. Also, if you have a slot-2 (GBA slot) device, hold "Select" while booting up with the AR inserted to load that slot-2 device in DS mode (Just like a PassMe/NoPass card).