multiple arcade emulators under one wheel

[juice]

hello guys. i am looking for some help on how to run multiple versions of mame under one wheel if it is possible. i have the roms for them and the games are running fine in there emulators. some games dont work (ie sound problems system 16 with the emulation) or they are not shown in the list. i see that you can use run command before the game start and pick the emulator or rom etc , but no other emulator showing apart from the default one. all my roms are in the standard emulator folders. i am also using attract mode for the front end

thanks for you time

[meleu]

@juice use the roms/arcade/ directory, as explained here: https://github.com/RetroPie/RetroPie-Setup/wiki/MAME#arcade

[juice]

thanks for the reply mate,, all sorted now cheers