[Help] How can i change the assets in COOP mode

[chilean]

Hi,
I want to add or change assets such as APC, Helo, planes, FAV, etc for my self enjoyment.
If any one know how can i add assets to asad khal in COOp mod it would be apreciate and please let me know what are the programs i have to use,

Thanks.

Chilean army

[Rhino]

https://www.realitymod.com/forum/f189-m ... orted.html