Well heck, dude, your tutorial is the one I'm crediting in my mod.
I unpacked Main.pak to get at the Stats folder. Pulled out ItemCombos.txt and ItemComboPreviews.lsx. Edited those in Notepad++. Made a "blank" mod the same way you have, set the mod settings, saved and closed Engine. Then made a Stats folder under Public\mymod. (Nothing under Mods\mymod except meta.lsx.)
Married it into my current savegame using the LSB rename trick you taught me. I am now crafting smokescreen arrowheads.
I'm going to make a post for this mod, "Fixed and Missing Recipes", in a bit. I'll be pointing to your thread for instructions on how to make that mod work with an existing save. I will definitely need a few other people to test it to make sure it really does work and I haven't done something else during my crude hacky attempts last night that's part of the solution.
Cheers again!
