Hi, I am rebuilding an old midway cocktail cabinet. I have an IPAC Ultimate keyboard emulator AND 2 ps3 controllers for a total of 4 players. What I would like to do, is add another instance of MAME to Emulationstation, with it’s own retroarch.cfg file, which contains “force screen rotation=1” and it’s own theme (just the same MAME theme, but with the SFV file edited to say something like “MAME Cocktail”). I have all of the controls working, but I cannot add the extra emulator. What I’ve done so far, is to install another copy of mame, which I put into /opt/retropie/emulators/MAMEFLIP/, I also added a folder in /opt/retropie/emulators/cfg/mameflip. I then copied the lines defining the MAME emulator system in es_system.cfg. I changed the path to it’s own rom folder /mnt/usbhdd/roms/mameflip (to specifically hold roms for cocktail flip). I changed the executable path to match where the second instance of mame is (/opt/retropie/emulators/MAMEFLIP). I also copied /etc/emulationstation/mame to /etc/emulationstation/mameflip.

Ideally what I’m trying to accomplish is:
Having in the main emulationstation menu, an instance of MAME4ALL-PI which points to a retroarch.cfg file that keeps the screen oriented the way it is, and utilizes the ps3 controls.
Having a second instance of MAME on the main emulationstation menu (preferably with an altered graphic that said “MAME Cocktail” or something, but I understand that SFV files cannot be edited in this way) that points to it’s own romset and it’s own retroarch.cfg file that rotates the screen 90 degrees, and utilizes the joysticks as controllers.
So I guess my question is, how do I add another MAME emulator, with it’s own menu graphics, and romset, etc.
If there’s anyone with a better way to accomplish this goal without adding another instance of MAME, like possibly how to program MAME to flip an individual game 90 degrees when it’s loaded?

Thanks for any help you can give me.