As others have said above, the addition of Threat and Error Management to the Human Factors exam really does require a firm understanding.
For the future benefit of others who are about to sit this exam, ensure you:
a) Are completely satisfied you understand Bob Tait's Human Performance and Limitations book.
b) For what it's worth, ask Bob for a copy of his TEM notes if you haven't purchased the new book already. (ATC won't provide you with a free copy so don't bother)
c) Get your hands on the Safety Behaviors kit available from the CASA Online store (you only pay for postage) This contains helpful information in regards to TEM and also has an extract from CAAP 5.59
Having said that, if you have a firm grasp of everything in the syllabus bar TEM, (and you're a little lucky) you should be able to pass regardless.