WhereEaglesDare I already have a frontend. The thing is, playchoice, megatech, megatouch and some neogeo titles are intended to work as multiple-cart on a single machine.
On playchoice 10, you hit your coins, select a game, and can play the game for a set period of time, or even change games for the same period of times. We actually have to press "game select" before being able to play, which makes no sense when the menu only let you choose one game, leaving 9 empty, non-selectable slots.
cotmm68030 could you look into how it was done for sega genesis? I wasn't aware of that one, but it seems like a good way to start looking. I wouldn't mind some legwork, and a custom resulting ROM, but if there's a way my kids can browse trough some of my playchoice titles on the MAME machine, I'll be quite happy with the result.