hmm ... there has to be a grey zone switchey thing that'll work. Maybe Bhu's templates.
Metamind PrC turns the Psicrystal into a (or also a?) Cognizance Crystal.
OK now it's a Construct creature AND a magic item, so target with PAO into lumpy-not-well-intended armor.
Shouldn't bother the functionality of the psicrystal at all.
Vaguely recall some Intelligent Sword = more goodies, thing that might apply here.
