IIRC, if you click between icons of crew, you select them all.
BTW, its one of few games I've finished, but never did manage to load additional missions pack :-?
tip: push all those sliders to minimum at beggining of mission, to 'rest' your team, and when it gets tough use mentioned 'both buttons' attack. sometimes it would be advisable to lower 'artificial inteligency' slider.
I've heard somewhere that there is a key to kill one or all of your team if you get stuck on level (not sure).
PS. try arrow keys, they might scroll the screen, maybe?