To extract or install the game, you typically need all parts (part1, part2, etc.) to be in the same folder, and you must use an archive tool like WinRAR or 7-Zip on the first file ( part1.rar ) to extract the full game data.
If you have all parts, I can help with the next steps to get the game running. automobilista_2.part2.rar
A file named "automobilista_2.part2.rar" appears to be a for the racing simulation game Automobilista 2 . To extract or install the game, you typically