Ensure your base game version matches the patch requirements specified by the creator.
Right-click the .rar file and select "Extract Here." If there are multiple parts (e.g., Part 1 and Part 2), ensure all parts are in the same folder before extracting Part 1. Ensure your base game version matches the patch
The file is usually provided in a .rar format. You will need a tool like WinRAR or 7-Zip to extract it. Part 1 and Part 2)