Don't be sorry, as long as you took some time to look around, I'll be glad to help you. Assuming you get a DS Lite... You say you want to play NDS and GBA games, not just NDS. As you stated, you'll need a slot-2 device and a pass device. Here's a generic layout of what you need: - Slot-2 memory card adapter (M3, SuperCard, CycloDS, etc.) - memory card + memory card reader/writer - Pass device (PassMe, NoPass, PassKey, etc.) As for specifics, here's what I would suggest: - M3 Perfect Lite (slot-2 device) - 1GB or 2GB microSD card + microSD card reader/writer - *Max Media Launcher (NoPass device) * = If you have an Action Replay DS, there is no need to buy a pass device. Just update the ARDS's firmware to the latest, and it will have the ability to boot homebrew from a slot-2 device (just hold "select" as you turn on the DS). So this is how things will work: 1. Use provided PC software to write GBA and/or NDS ROMs to the microSD card. 2. Put the microSD card into the M3. 3. Put the M3 into the GBA slot of the DS 3.5 (Optional) Put your pass device (Max Media Launcher, ARDS, etc.) in the DS card slot 4. Turn on the DS. - If you DID put the pass device in the DS slot, the M3 will automatically boot into NDS mode, where you can run NDS ROMs but not GBA ROMs. - If you DID NOT put the pass device in the DS slot, the DS will boot up normally and you will choose "Start GBA game" from the DS's main menu. The M3 will now load into GBA mode, where you will be able to run GBA ROMs but not NDS ROMs. If you need anything else, feel free to ask!