I used IEEP to create back in the day but it took a lil' bump to the noggin so I've been using DLTCEP lately.
Heh, don't I feel silly. I could've sworn that I had read an article/tutorial on making an item for your character only through use of something other than stats and class. Mayhap I was mistaken?
EDIT: Now that I think about it, for Xan, that was probably something hard-coded into the game itself, no?
StrRef 10220: ((This blade resists any attempt at using it. Likely it is attuned to its owner and none other can wield it. The hilt bears the name "XAN." ))