Hi John,
I got this from a guy next door (hoarmurath) in the mods section, I tried it and it works great, I never need to change the crew around, they stay 100% all the time:
http://www.subsim.com/phpBB/viewtopic.php?t=40830
It is the only mod I'm using at the moment, by the way they can get killed if the going gets tough.
