How do you run run and gun 2 for mame

Once you have the downloaded rom "run and gun 2 (ver UAA)" usually identified as rungun2.zip and about 18 megabytes, you also need to download the parent rom, system GX (a Konami rom) usally found under konamigx.zip. This rom is needed for all Konami games to run. Place both files, still zipped, in your rom folder in the mame directory.