I was under the impression that only engineers could use AP credits to test directly into orgo (unless it's changed for the 2014 class).
Another thing to note is that the premed engineers I know take Gen Chem anyway, since there are med schools that do not count AP credits in their "full year of chemistry" requirement.
Tainted love- although I'm not premed, from what I understand most med schools would like up to calc II. However, of all the premeds I know, they take calc III as well. I'd do that; calc III was an easy class in my opinion.