Rename the existing SaveData folder to SaveData_Backup . This way, if you hate the full save, you can revert.

If you ran into any specific errors during these steps, let me know. I can help you troubleshoot further if you tell me:

: Start with elite units like Kenshin Uesugi or the Takeda Four right from Turn 1.

Right-click the downloaded System.dat , select Properties , check the Unblock box at the bottom if it appears, and click Apply . Missing Administrator Privileges

Your final folder should look something like this:

That said, most English guides assume you are using the fan-translation version (often labeled " Sengoku Rance English Ver1.00 " or similar). The save installation process is identical.