You need:
- A modded Nintendo 3DS System (With Luma CFW and FBI installed)
- Any copy of New Super Mario Bros. 2 - A bit of free Space on your SD Card
1. Download the Modpack. It contains everything you need (Besides Luma CFW and New Super Mario Bros. 2) 
 2. Go into your Regions folder and copy the files in there onto the SD Card. 3. Disconnect your SD Card from your PC an put it into your Nintendo 3DS System. 4. Open The FBI Filemanager on your Nintendo 3DS System and install NTR. 5. After installing, open NTR and follow the instructions there. 6. Open New Super Mario Bros. 2 and you are good to go.