Oh, thank you so much for this! I've been looking for something like this everywhere!
EDIT: It works! But there is a downside, on Chris's campaign; it doesn't have the Inf. Magnum or any of that... can you fix this soon?
EDIT 2: OK, I just went back from an older save w/ Inf. Magnum x2, and Inf. Mixed Herbs x2, and Inf. Ink Ribbons; put them into the Item box, and they appeared in the Item box for Chris's campaign! Too complex, yet simple at the same time.