Is it possible to add chunks so that non-modded boxes can see my duplicated items

Also, how can I duplicate a vehicle spawn so that I can choose at the main menu what I want to spawn?(For example, in SkyTrak hogs are spawned through the itmc and you can't choose primary light and primary heavy vehicles for those because it is spawned a diff way than the main menu works... so how can I make the mainmenu choose a certain vehicle for that session then the next game session have a diff one with a simple swap of the menu.)
I think the vehc tag has something to do with the mainmenu.