You could try phoning up the schools and asking, or just e-mailing them. I got a 4.5 on the analytical writing section; I asked someone at a top 5 IR school whether it would be a problem and they said no, since there was plenty of other evidence that I'm a good writer (majored in literature, won award for my thesis). Given that you're an international student and you did fine on the TOEFL there's a chance they won't care about the verbal GRE score (I really doubt they will care at all about the analytical writing score), but it's a good idea to ask them.