The sengokufull5_1.zip file you have requested: Mods / Total Conversions / Sengoku 5.1 Full - 48.25mb is not available. Perhaps try browsing all files for the game Battlefield 1942 and upload any files you want to share or are missing. This is the only information we could locate:
The Sengoku devs have released the full install of their 5.1 version. It is a total conversion that brings Japanese Samurai to the Battlefield.