Adding ROMs

[buddyjack2]

Hope these are easy questions to answer: I successfully sideloaded MAME to my AppleTV 4 and have been playing the two game whose ROMs I had at the time of sideloading. Now, in order to add new games, I've gotten those additional ROMs from an online site but do I repeat the whole building process in xcode again? And should I delete MAME from the AppleTV first, before re-sideloading it with the new ROMs added to the Resource folder in xcode?