My location is the c drive but i have it set up to be portable so its relative to the retrofe root folder, that way i can stick it on another drive or PC
My launcher is
executable = .\emulators\model 2\emulator.exe
arguments = %ITEM_NAME%
my collections settings is
list.path = ./roms/Model 2/roms
and my rom path settings in the model 2 emu is
Dir1=..\..\roms\Model 2\roms
I haven't went any further than just grabbing the model 2 emulator, dropping a few roms in and change the paths. It loaded and i had a quick game of zero gunner and checked sega rally loaded and thats it, no art, videos or even configuring controls