The FAT32 file system cannot process individual files over 4GB. If your Partie 5 file is larger than 4GB, use a tool like Irisman or multiman to read the file from an exFAT or NTFS drive, or use a split-PKG utility to install it via internal network file transfer (FTP).
Official Sony firmware cannot install unsigned .pkg files. PARTIE 5 PES 2013 PS3 PATCH 2025.pkg