Some of my readers, like Jon, are devious:
Just run Hillary’s “3 a.m. Phone” ad in its entirety, including the “I’m Hillary Clinton and I approved of this ad”, simply followed by “I’m John McCain and I approved of this ad”. Hillary has a fit about the use of her ad, drawing further attention to it. It is endlessly played for free on the news. Devastating fun at Obama’s expense.
Oh, you could tweak this a bit to make it more explicit.
“I’m Hillary Clinton, and I approved this message.”
Cut to McCain: “I’m John McCain, and you know what, my friends? I approved this message, too!”
This will work if Hillary’s campaign uses the Susan Rice comments in an ad, as well.