Okay I'm at the Mercenaries and having a REAL pain completing Hunk on ..

I can't guaruntee this will work, but I would try pumping lead into him. When he gets too close for comfort or if you need to reload run you hear me RUN!!!!!!!!
Another thing to do although it's rather hard is to throw grenades. They don't normally work but if you hit him right you can stun him for a few seconds. Remember when I said pump lead into him?,Now's the best time to do that.
One last trick is to shoot him while he's not moving. I've killed him this way.

What you do is you take krauser(if you haven't unlocked him unlock him in the castle)then when you are on a sort balconey at the sart wait for him. Meanwhile kill ganados with your bow and arrow(TIP:oppisite there is ladder when they are climing,shoot them then you get high points(especially with the dynamite)).when he comes, make you get your arm ready with the X button and when he comes with more zombies charge with the A button then he should be gone.Keep killing zombies and use this technique as well when there are too many zombies in front of you.((=+D�aTh dRaG0|\|+=))

The best thing to do is lure him to the huge tower kill everyone until you hear him jump wait until you can see him shoot him a few times he should fall throw a flame granade or hand granade he should die if you do that enough
After I play again I will give you the locations that he starts in