I started my new game from the Episode 1 and worked great!! when i started from Ep2-3-4 doesn't work....
Step 1.- Start a new game and play, when you see the 1st "auto-save" quit the game, log out extract and edit your save with this editor.
Step 2.- Edit the Claire's inventory and when you finish select "Save Current Character" now select Moira and after edit her inventory, again "Save Current Character" and do the same with Barry and Natalia... if you dont want edit/add more things then "Save"
Step 3.- Now continue playing the Claire's story and after get your rank you going to see 3 options you must select
"continue".
Step 4.- When you start the Barry's history he has all the stuff added before (step 2) now just complete the Ep1 and after get your rank again select
"continue".
Step 5.- When you start the Ep2 Claire has all the stuff added before and is the same for Moira/Barry/Natalia inventories...and this happen for Ep3 and Ep4.
Step 6.- If you need add more ammo wait to see the "auto save" icon then repeat the step 2...
step 7.- If you dont want play the 4 chapters the same day or you dont want to continue playing after to see the "auto save" icon you can quit your game and play later or the next day...just select Main Campaing and continue...do this does not affect your inventory or your stats for get S-Rank.
NOTE: normally i like edit my save when i am playing with Claire in the begining of the 1st chapter and in the begining of the 3rd chapter... i like to add items/ammo for the four characters. But basically after see the "auto save" icon you can edit it...