As you have discovered by now, the forums are not the place to go for last-minute questions - it can take 3 to 5 business days to get a response here. For future questions like this, please contact the office directly at 800.576.GMAT or
studentservices@manhattangmat.comIt sounds like you have already taken your official test, but in case you still want to know how to use the code, I'll ask someone from Student Services to come here and answer you. (This folder is for Strategy questions about how to take the GMAT and only teachers normally post here. We don't know the answers to any technical questions.)
I hope the test went well and you don't need these anymore! I will mention one thing for others reading this: taking a bunch of practice tests in the 5 days leading up to your real exam is a REALLY bad idea.
CAT exams are really good for (a) figuring out where you're scoring right now, (b) practicing stamina, and (c) analyzing your strengths and weaknesses. The actual act of just taking the exam is NOT so useful for improving. It's what you do with the test results / between tests that helps you to improve.
Practicing stamina a bunch of times in the few days right before your test usually HURTS stamina for most people. It's like running a bunch of practice marathons in the few days leading up to a real marathon - you just tire yourself out.