[FAQ] playing NDS games on the neo2-SD/TF

What you need:
1. Neo2-SD/TF
2. Mk4-mini
3. A SD/TF card depending on you're neo2 version
4. The newest menu (currently menu v1.31: http://www.neoflash.com/go/index.php?option=com_content&task=view&id=13&Itemid=27 )

What to do:
1. Insert both the neo2 and the mk4-mini into your DS, and put the mk4-mini in GBA-mode.
2. Insert a SD/TF card into a card reader for your PC.
3. Format the SD/TF card (either fat16 or fat 32 — try both if you encounter any problems)
4. Download the newest menu (currently menu v1.1) and copy it onto the SD/TF card (remember to unzip it first, so that you have a .neo file)
5. Copy clean/unpatched .NDS roms onto the SD/TF card (again remember to unzip them first, if needed)
6. Insert the SD/TF card into your neo2 cart (it is front loading).
7. Turn on your DS, and it should automatically load the neo2 menu.  Press 'A' to continue (when it asks you to insert you SD card).  Later on, if you need to re-detect your SD/TF card, press 'B' and then 'A' again.
8. Use up/down to go to the neo2 menu file and press 'A'.  Now the menu is updated
9. Highlight the NDS rom you want to run and press 'A'
10. It will always say "erasing nds save", possibly followed by a message that it is loading a save — after that press 'A' once more.  A .sav file should be created on your SD/TF card after you run another rom (or run the same rom twice).  This .sav file can be easily backed up to your pc.
11. Now enjoy the game.

more info: http://www.neoflash.com/forum/index.php/topic,3324.0.html