By this, I mean the cabinet, marquee and flyer art, as well as game history. Do you also use extra software like the one used to save high scores?

I tend to want those images for all the games I have, as I have a fascination with videogame history (marquee and cabinet art are part of that history, after all!).

And the high score.dat file should be directly part of MAME. I don't understand why they don't include it with the latest releases.