Another great release! It's getting better with each release merging the MAME and MESS files and combining the software files into snap, titles, and video folders.
One problem I've seen: The Dat file "ps MAME Alternate Artworks 20160320" gives an error on the "subs" missing rom: subs.lay. So either the CRC is wrong in the dat file or the subs.zip does not contain the correct subs.lay file in the download file you provide.