Each ZIP file contains every file needed to run that specific game.
Detailed instructions for building, validating, or updating your set can be found at the Libretro MAME 2003-Plus Documentation . Why "Full Non-Merged"? mame 2003plus reference full nonmerged romsets link
: You do not need to hunt for separate BIOS ROMs, as they are included within each game's ZIP file. Core Compatibility Notes Each ZIP file contains every file needed to
: The RetroArch playlist scanner specifically supports the Full Non-Merged, TorrentZipped format for this core. mame 2003plus reference full nonmerged romsets link
MAME 2003-Plus (MAME 2003+) is an updated version of the classic MAME 0.78 core, optimized for performance on low-end hardware like the Raspberry Pi. Unlike static MAME releases, MAME 2003-Plus is a "living" core that includes backported games, bug fixes, and improved features from newer MAME versions.