Two weeks is tough but doable. Just don't overload yourself with too many hours of practice each day. Have you established what your weak points are yet? If not take a Princeton Review
practice test - they break your score down by question type, and you can review the answer explanations to look for patterns in your errors. Then definitely maintain an error log
as recommended on this site.
In the short amount of time you have, definitely go through as much of the Official Guide as possible, but be sure to take at least 4-5 full-length practice CATs so that you're comfortable with the interface. If you get stuck on how to conquer certain question types, this forum should be very helpful! I've surfed for a bit before registering and there's a ton of good info here.