I brought everything...used charts, ERSA, DAPS, AIP, and CAO's...not too much on CAR's as I recall.
Now, I'm not sure, but was there a question besides what pubs do you need? I did the IREX by self study, however...
I'd suggest you find some practice exams and work them in exam-like conditions. I suggest this for two reasons. One, doing the practices will tune you in to the stuff in the charts/manuals you'll be most likely to need in the exam. Two, doing some practices in a quiet room and limiting yourself timewise as if it were a real exam will give you SOME notion on whether you're prepared enough.
Its no easy test, the IREX, so get studying. Good luck. Remember, an ounce of prevention (preparation) is worth a pound of cure (crying yourself to sleep if you fail the darned thing...and then having to do it all AGAIN).
HP