double click on your base
highlight the people you want to put in your aircraft by clicking on thier name once,
then click and hold on one of the pictures of a 'highlighted name' and drag them across to the aircraft you want to put them in... then let go of your mouse button.
Hope that helps.
Ah yes another good tip:
If the Cult of Cirus starts getting cocky and demanding money - or threatening to atack you. Just raid them until there budget is in the minuses (eg -20 000), they wont be able to afford to attack you.
*The best way to get thier budget down is by sending in 1 single guy with 2 autocannons and filled to the brim with incidenairy ammo, incidenary grenades, high explosives and a hover suit if possible.hover up in the air, put your guns on auto fire and fire around randomly (laugh like a mental patient whilst you do it, it adds to the fun), setting as much of the building on fire and blowing up as much as possible. this causes alot of damage which they have to pay for
*