I don't know if this helps at all, but I saw it and had to at least let you guys look at it. It explains how the item formats work in the Aurora Engine. There's documentation about everything here.
http://nwn.bioware.com/developers/Bi...tem_Format.pdf and
http://nwn.bioware.com/developers Hope this helps someone. I at least learned how CostTable's worked. Let me know if this helps anyone.