Ryu, if you\'re not, try switching to control scheme C. It puts the walk/run feature into one button and works really well. It doesn\'t solve the inprecise aiming thing, though. But I read something about kerosene and a lighter being able to stop the super zombies from forming.
Haven\'t tried anything like that, though, since I\'m relatively new to the series and it\'s taking me forever to figure this stuff out.
-Eik