You cannot use part1 alone. You must have all subsequent parts (e.g., part2 , part3 , etc.) in the same folder.
After installation, open the folder named PLAZA (found inside the extracted ISO/folder). Copy all files inside it and paste them into the game's main installation directory, overwriting the existing files. 3. Troubleshooting Daymare.1998.Modern.Take-PLAZA.part1.rar
If you get a "CRC failed" or "Corrupt volume" error during extraction, one of the parts (not necessarily part 1) is likely downloaded incorrectly. You will need to re-download the specific part mentioned in the error. You cannot use part1 alone