Failing that (some people dont agree that it will work, some dm's dont allow feats out of the monstrous manual, or some other mitigating circumstance)...<snip>
That was the same argument my DM made when I requested use of Improved Natural Weapon for my monk. Anyway, I note that Complete Arcane makes reference a few times to PCs using feats from the Monster Manual.... I may have to revisit the whole thing with my DM.