Installing packages from PSNDL archives requires a modified PS3 (CFW or HEN) and involves placing .pkg files on a FAT32 USB drive, while placing corresponding .rap files in an exdata folder to handle licensing. The installation is finalized via the Package Manager in the XMB, with options to use FTP or NTFS drives for files exceeding 4GB. For a guide on using the updated archive, visit EternalModz/PSNDL-Net-Archive .