I've wanted to add some humans to my Grymn mercenary team and when Andy @ Heresy came out with his scifi troopers I jumped on them. In my game fluff they are some "orphans" from another mercenary group that were working with the Grymn. The human group got in a bad situation but completed their objective allowing the Grymn to complete theirs and thus completing the mission. The Grymn team "adopted" the surviving team members into their group.
I hope I haven't committed any heresy by converting Hersey miniatures using GW parts... Anyway I wanted to make these guys a special / heavy weapons team. I still need to do a bit of GS here and there.

The arms are converted scout arms. For the female trooper I've thinned down the arms a bit and added Dark Eldar hands to decrease the size. I think I'll thin the arms down a bit more.
I'm not quite sure what weapon to give her. I have an eldar plastic flamer (setting on top of her hands in the photo) SM flamer (Old and new style), eldar melta, Tau carbine with pathfinder designator thingy, scout shotgun, SM bolt gun. So far I think I'm leaning toward the eldar flamer or the pathfinder carbine, adding a little bonus for her mates to hit can't be a bad thing.