Welcome from me too! And yes, GWX is where it's at
.
On the subject of crew fatigue you can always turn fatigue modelling off via SH3Commander:
http://www.users.on.net/~jscones/software/products.html
As you're using GWX you'll also need the additional files near the bottom of this page:
http://www.users.on.net/~jscones/GWX/download.html