: Check the file size against known databases to ensure the download is complete and hasn't been tampered with.
: An abbreviated or codified title for the game. In this context, it likely refers to Touhou Fuujinroku ~ Mountain of Faith (Virtual Autotowers) or a similar entry/fan-game from the Touhou Project series. TOHUFMVIRAUTO-(USA)-NSwTcH-[BASE]-NSP-Ziperto.rar
: Use a tool like 7-Zip or WinRAR to extract the .nsp from the .rar archive. : Check the file size against known databases