MAME2003 SETUP:
Here's what you do (I put all the files needed in one spot for convenience in installing mame):
Download and put this folder (retroarch.hmod) into user_mods, and install the module from the Hakchi2 menu>Modules>Install Extra Modules.
Download and put this file (mame2003.hmod) into user_mods, and install the module from the Hakchi2 menu>Modules>Install Extra Modules.
Pull the pac-man zip into the hakchi2 program, choose 'import as archive'.
On the command line, put this (or something similar-your directories might be slightly different): /bin/mame2003 /usr/share/games/nes/kachikachi/CLV-Z-OYAEV/pacman.zip (a space needs to be after 'mame2003')
If you need mame samples, you can install 'bios_images.hmod' (In case sounds are missing in some games like Donkey Kong or Galaga.)
Mame 2003 uses Mame romset 0.78.
If you need more mame2003 roms, download the torrent I provided. The torrent contains 44 GB, but you can choose to download only a few if you wish. https://github.com/kaz321123/Mame-S...et_MAME0.78_ROMs_CHDs_Samples_archive.torrent Name is: MAME2003_Reference_Set_MAME0.78_ROMs_CHDs_Samples_archive