Frag Town Airfield unuseable

[Zam1]

hi im wondering how you use the planes or anything on the airfield at the frag town map you cant use the planes or the fuel truck the Kubel wagons and can only use one out of the 3 hortch cars and the 3 universal-1 farm tractors but the tractors are pointless so dont bother trying to figure them in but that's it for the vehicles pre-placed on the map.I've tried combat mode I've tried assault zones, i cant figure it out is there something i have to place is there only one kind of unit i can use to fly/drive them do i have to have a special item. i don't know what else to say about my problem for u to better understand and finnaly answer it.

Also on an unrelated topic I'm trying to figure out how to place like inventory items on top of each other like grenades when I take the from a truck they come stacked but when I put them in my inventory I can only put them side by side which takes up a lot of room would you mind answering that to.

Thanks.