: Right-click on Part 1 and select "Extract Here" using software like WinRAR or 7-Zip. It will automatically pull the data from part2.rar and the others to recreate the original installer.
If you receive an error saying or "Unexpected end of archive" specifically mentioning part2.rar , it means this specific file is corrupt and needs to be re-downloaded.
: On its own, part2.rar is useless. It must be in the same folder as part1.rar , part3.rar , and all other subsequent parts to be extracted.
: This specific part contains a chunk of the game's assets (textures, audio, or code) required for the full installation.