Hi. I've tried downloading some MAME ROMS from romnation ( http://www.romnation.net/srv/roms/mame.html ), copied the ROM's to the ROMS folder in my MAMECE3 9.5 install, but they don't appear in the list of available games. I've done the same with a couple of ROMS that were given to me with the copy of MAME CE3 that I'm using, and these appear in the list no problem, straight after copying them to my device.
What am I doing wrong? Should I be able to get these downloaded ROMS to work at all?
Sorry for being such a dumbass