Check out this site for every mame rom (no rom download ! - just information for all roms ) http://www.mameworld.net/maws/ To run Gun Smoke you need : "Gun.Smoke (World)" 244 KB .This is the parent rom. Gun.Smoke (Japan) Gun.Smoke (US set 1) Gun.Smoke (US set 2) these are clones . And remember :Download just "mame roms " for your mame32 version