For those of you who have lots of games (I'm assuming most who've built a cabinet), and especially those who often have friends over to play the games, how do you keep track of what buttons do what for each of the games? Obviously single button games are pretty straightforward, and for console emulators there's a one to one mapping that's constant to the controller so all games will be the same. But once you get to the multi-button MAME games it seems like it gets pretty easy to forget.
I remember using an Arcade Legends 3 cabinet, and when you started a game, before it loaded it showed you a quick help screen displaying which buttons did what. Has anyone done anything like that or have any other suggestions on how to keep it all straight in your head and easy for visitors to figure out?