Today I made a custom loadout for the Bmk2:
Spoiler
Loadout: (http://img52.imageshack.us/img52/5476/java2012090111591784.th.jpg) (http://imageshack.us/photo/my-images/52/java2012090111591784.jpg/)
Weapon groups: (http://img687.imageshack.us/img687/9855/java2012090111592306.th.jpg) (http://imageshack.us/photo/my-images/687/java2012090111592306.jpg/)
I tried it in battle against some fighters, it did well, but it almost never used its swarmers unless an enemy fighter went right in front of the launcher. I mean, it's not that much of a problem, usually fighters tend to circle the target so they still eat some swarmers, but i wanted to report this "bug" in case it's something easy to fix (if there actually IS something to fix, of course). :)