www.mamedev.org/index.php
download mame, extract the zip file, double click the mame icon & that's mame
find some roms you want off a site or torrent a full set off the internet archive or somewhere. Get a set number close to your mame number (0.289 is the newest one, updated most months)
mamedev.org
MAMEdev.org | Home of The MAME Project
