"On June 30, 2006, after an eighteen month investigation conducted by the [zealous prosecutors], [In order to make the pest go away ]Kerik pled guilty to two ethics violations (unclassified misdemeanors) and was ordered to pay $221,000 in fines at the 10-minute hearing."
Kerik having misdemeanors will hurt Guiliani? Not that I can see.
Dismiss this matter at electoral risk.
Oh, and regarding needing tons of money - attack ads are now dirt cheap - they can just be dumped on YouTube. Kerik crash-and-burn videos are perfectly suited for that medium.