Download MAME. Find the proper roms and place in rom folder. Create a mame.ini file. Easy way to do this if not familiar with command line is hold shift key and right click on mouse on the MAME folder and choose -open command window here. type in MAME64 -cc (MAME64 if you are using 64bit version). Open up MAME folder and double click on the MAME64 icon. Look for the roms you placed in the folder and double click on that game in the ui.