Space Invaders Emulator is not the easiest to setup. I have included all needed files in the download (except the Space Invader roms).
This emulator expects the ROM to be in a single file, invaders.rom. If you download the ROM from an archive it may come in four seperate files. This need to be merged into one with commands like: Windows copy /b invaders.h+invaders.g+invaders.f+invaders.e invaders.rom Unix cat invaders.h invaders.g invaders.f invaders.e >invaders.rom
Once you have the invaders.rom copy it to the space_invaders directory and:
run 'merge_rom.bat' if on Windows or 'merge_rom.sh' if on a Unix like operating system. This will generate a 'space_invaders.nds.gba' which can be written to your GBA flash linker cartridge and loaded on the DS using WifiMe, a PassMe or a flashed bios using FlashMe. It must be on a GBA flash cartridge as I store the ROM is loaded from the cartridge address space.
After all this the emulator does run well, excluding sound.