First issue I'm running into is the custom part.
Let's say I'm trying to make a ring with custom stats. When creating items I can see that they have a "Stats" field, which I assume dictates what the piece of equipment does when equipped, but I can't seem to find where to create a new stat. They don't seem to be templates, unless I've been missing something obvious and I'm too sleepy to understand the resources button right now.
It would also help me to see how the editor handles generic rings and amulets, as I've found no reference to them in the resource list either.