To use , you must extract it along with its other parts to reconstruct the required language file for the game installer. This specific file is part of a "Selective Download" feature designed to save disk space by allowing you to download only the languages you intend to use. Installation & Extraction Guide
If you are extracting a .rar set, make sure you have Part 1 through the final part. If Part 4 is corrupt, re-download only that specific part from the original source. setupfitgirlselectiveenglishbinpart4rar exclusive