Excelsior Help

I missed the recent enroll date with ec and am doing the new curriculum. I am testing this week on the equivalent to NC 2. I am using distance learning systems of indiana for my study material. They said that they are rewriting NC 3-5 for the new content. They suggested I do health differences across the lifespan 3 or nc 6. I have a fundamentals of nursing textbook, but they said I would also need a psych and med surge book which are on backorder. Here's my questions:

1.) Will doing the test out of order mess me up?

2.) Do you think I can pass this test with just the fundamentals book and the study material or should I wait on the other texts.

Thanks for your responses!