For Citra: 1. In Citra, right click NSMB2 in the game list, and select "Open Mods Location". 2. Download and extract the part you want to play. 3. Copy the "romfs" folder from the newly extracted folder into the folder Citra opened earlier. For 3DS: NOTE: If you have already played other NSMB2 mods, make sure to delete the Luma directory for your NSMB2 TitleID before proceeding. 1. If it isn't already, set your 3DS up with Luma3DS by following the 3DS hacking guide here. 2. Enable game patching by holding SELECT on 3DS boot, ticking the "Game patching" box, and pressing START. 3. Insert your 3DS SD card into your PC, and find your TitleID version from the list below. NSMB2 Standard Edition: EUR - 000400000007AF00 USA - 000400000007AE00 JPN - 000400000007AD00 KOR - 00040000000B8900 NSMB2 Gold Edition: USA - 0004000000137E00 NSMB2 Special Edition: EUR - 0004000000137F00 JPN - 0000400000137D00 4. Download and extract the part you want to play, and copy the "romfs" folder to SD:/luma/titles/[TitleID]/. 5. Example directory (for USA Gold): "SD:/luma/titles/0004000000137E00/romfs/Course, Unit, etc". NOTE: If the "titles" folder does not exist, create it! 6. Turn on your 3DS, with your SD Card inserted, and launch your copy of NSMB2.