I did a little work on the adventure_item.xml file before reaching a problem I couldn't easily fix. The impaling weapon was just a raw drop. The Blade of Frost started as a Frost Weapon +1 and I keyed in the basic weapon information. It's sort of usable but now I have to get the hard things out of the magic item class. (i.e. the powers and properties)
And then there needs to be a way to link it to a character sheet. I'm sure that will be fun.