The .itm codes are already in the game. What Baldurdash gives you is access to the merchant .sto files for Joluv and Dierdre (the special merchants that came with the Collectors Edition) so that you can buy these items legitimately.
Personally, Robe of Vecna (the best armor that kensai-mages can use), Celestial Fury, and Dak'kon's Zerthblade are must-haves.
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