Just setup a new Raspberry Pi B with version 2.2 of RetroPie. Based on comments in this forum I would like to change the default MAME emulator in 2.2 to Mame4all-pi. I was referring to an older thread:
OK thanks I overlooked the first command line. It looks like you have it set up so that either imame4all or mame4all-pi could be used. If I wanted to use mame4all-pi exclusively could I simply delete the <!–alternatively> command line?