You can install the extracted .nsp files using a homebrew installer such as , DBI , or Awoo Installer .
The .rar file is a container. Use a tool like or WinRAR to extract the contents. FUSER-NSP-ROMSLAB.rar
If the .rar contains multiple files, install the Base Game first, followed by any Updates and then DLC. You can install the extracted
Ensure your console has the latest sigpatches installed. Without these, the Switch will fail to launch custom NSPs. install the Base Game first
Use a tool like DBI or Tinfoil on your Switch and a companion app like NS-USBloader on your PC to transfer the file directly over USB. This avoids the 4GB file size limit of FAT32 SD cards.