the PC10 stuff is basically pointless in this day and age anyway.
Grab MESS or UME (MAME+MESS) and just run them in the NES driver the way they were meant to run.
Sure they're not 'arcade games' then, but does bolting a timer + selection menu on the top really make them arcade games in the first place? The actual game code on the PC10 games is *completely* unmodified from the NES originals.
PC10 was just a marketing tool for Nintendo, so unless you like feeding in credits just to keep a timer high, it's kinda pointless, you're running the exact same code but having to hit the credit button periodically.
As for multi-game support, MAME still doesn't have it for PC10, although it's not really far off (I'd expect to see it this year) but even then
a) nobody would use it (because you'd have to use the MESS-style syntax anyway to select all the carts you wanted)
b) it would still be kinda pointless
It amazes me that some people hack up roms just to run them in the PC10 driver in MAME, when you can grab MESS or UME and have the proper experience with less hassle :-p
Personally I'd throw the whole thing in MESS anyway, the VS. System is a real NES arcade, as are the Chinese multi-games where the actual NES code is different and the games have been specifically modified to work as arcades.. This is just a NES with a timer/menu bolted on.