New to modding — file controls cargo items

Hey guys, I’m new to modding the IW2EoC. I’m trying to add new cargos into the game, but I only found the text. Although it has number in excel, it does not match the number in FutureTrader. So my assumption is that there must be somewhere that has a list of cargo with its index number.

Anyone care to tell me which file it is? I’m trying to add new blueprints to the game so that the base can build weapons as well as ammos :-). Maybe later I’ll add making food and water. It’s just fun to do it!:p

The problem is, after I added new items to the cfg list in FutureTrader, (starting index #901), and changed the package file.
from
if ( cargo_int < 700 )
to
if ( cargo_int < 700 || cargo_int > 800 )
in 2 or 3 places, then changed
if ( cint < 700 )
to
if ( cint < 700 || cint > 800 )

It works well, but when you load up the cargo screen in the menu, the blueprints I just purchased erased automatically.

Anyone knows how to prevent it from removing if we cannot add new cargos to the game?

Any help would be appreciated 🙂

Also I looked into the IFF mod's "Leaf Tabacco" bug, I'm really started wondering why don't they just add a new cargo? Is that because of the game's engine limition?