: Look for Norm at the beginning of the DLC; he provides a multi-stage quest involving delivering items like "Penny's Vegan Frankfurters" and a black box.
: To successfully extract the game or DLC, you must have every part in the sequence. If part2.rar is missing its counterparts, the extraction will fail with a "missing volume" error.
Because large digital releases are often split into smaller "parts" for easier distribution, you likely have a collection of files named part1.rar , part2.rar , etc.