First Aid for the CS has everything you need to know. Split the cost with a friend, skim the front of the book, do the cases in the back with your partner & you will have no problem with the test. The test is a stupid, painful, expensive process - even tho you probably don't actually need to study for this thing, you would hate to have to reschedule and retake the test. By the way, I have heard of American med students failing the test, so its certainly a distant and revolting possibility that you have to consider. I took my test in Mid november and I'm still waiting to hear back but I used first aid for CS and felt confident about how I performed.
Boy do I sounds like an infomercial. Just sign up and get it over with asap.