For the archive to be recognized as a single unit, every file must have the exact same base name. Changing "FC2-PPV-4406627-1.part08.rar" to something else will break the chain.
By ensuring you have the complete set of files and using the correct software, you can successfully manage multi-part archives and access the media contained within. Are you having this specific file, or FC2-PPV-4406627-1.part08.rar
If any single part, such as part 08, is corrupted or missing, the entire extraction process will fail. This is why many users search specifically for individual parts if their initial download was interrupted or a specific link went dead. For the archive to be recognized as a
Never run an .exe file that claims to be a "part downloader" or "unpacker" for this specific archive. or If any single part