The SotF inventory system does not make much sense for this game imho.
a) in SotF you have quite limited number of items
b) in SotF inventory system you have a specified place/slot for each item type
c) in SotF inventory you have only a limited number of any item you can carry per each slot
d) Zomboid / VEIN inventory system is weight based and you can have different backpacks
- in short, SotF inventory system is pretty much unusable for this game