Hey!
Ultra noob (and french) here. I began to built my collection and I finded those awesome Rom pack. I just downloaded the mame Rom Pack and the only thing I find is a XML Document. Not Zip roms or anything. I continued my setting in Launch box, it analyzed it very well, but I could not play the games. It wanted to run, but failed after like 5 seconds (no audio or video). I know I probably messed up or forgot something, but right now I'm searching my Obi wan. You are my only hope.