Zalan

stuck on shipping route mission. on lower hull. killed everything I could find. now stuck. found broken stairs to go up above the engine rooms, and blew up the elevator by accident. my question is this, do I need to go up!?!?! I think there is only one more alien left somewhere but i know it can't be on the lower two floors cuz i cant find it! help, what should I do? I don't want to start shipping route missions over, u all know what a pain they can be. hack? cheat? how? pls help!