ok first the chopper thing, take all fuel out of the chopper with the slider bar. then make a Get In Waypoint ON the helicopter.. iinthe on activation field of the get in waypoint put
choppername setfuel 1
now it will wait for the whole group to get in then it will set the helis fuel to full so it will start up the engine and take off. Just make sure that u name the chopper (say heli1) then the fuel command would be heli1 setfuel 1
now the weapons thing... It has to do with adding ammo inside th discription file. Im not sure the exact lines for it so im keeping my mouth shut.. Im sure someone on this editing forum knows