Put all three files in your emulator's "BIOS" or "System" folder. Config Settings:
Unlike a standard game ROM, the Menu ROM contains — but it does contain the system’s BIOS-like interface, the “Health & Safety” screen, and the cartridge-slot detection routine. Nintendo Ds Menu Rom
For many, half the joy of revisiting the DS library is the ritual of the boot screen. Seeing the iconic menu, clicking the touch screen to launch a game, and hearing the splash sound replicates the feeling of holding the original console. Emulators without the BIOS/Firmware boot instantly to the game, breaking that immersion. Put all three files in your emulator's "BIOS"
Some popular menu ROMs for the Nintendo DS include: Seeing the iconic menu, clicking the touch screen
Modern DS users often replace or upgrade their original menu with , an open-source project that replicates and improves upon the Nintendo DSi Menu interface.