Based on 3DS Rom_Tool By 3DS_GUY You need .Net Framework 4 run this app. You can add multiple files. It supports English. Now To use this app , you must download the 3ds rom_tool by 3DSGUY(http://gbatemp.net/threads/3ds-rom-tool-rom_tool.349314/). Rename the rom_tool to "RT.exe" and put it to the GUI's directory.(My Apologies to add the original app.) Thanks to my friend Simon You to add dragdrop function! We're classmates.