No luck so far, though it is amusing to see my post show up on Google at a high rank XD.
The items in the game editor have both a text id and a numerical id. I've tried variations of createitem using the syntax from previous Bioware or Black Isle games, and nothing has worked. Something else that's interesting, if you use the toolset to open up your save games, items in your party inventory have a completely different ID number as well. My next plan is to experiment with manually adding a inventory item to a save game, though that's going to be a bit of a pain.
For having accomplished nothing of any real significance, I have an enormous ego.