If you could make it almost as overthetop as possible.
I would strap ALOT of fireworks to a zombie, dowse it in gasoline, and throw a lighter at it.
If it came staggering out of the smoke, I would then roundhouse kick its head off.
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I would cover it in stray cats, douse the cats and zombie in gasoline, show it pictures of what I did to its zombie friends and family, set a baseball bat with nails sticking out of it on fire and repeatedly beat the depressed, flammable, cat covered zombie until it died of repeated exposure to my awesome/death by fire.