There has been so much scare mongering about the JAR exams for the ATPL's over the last year. It is a new system and it is difficult, I was on the third sitting of the exams last year, I passed all 14 first time. How? By studying every hour that god sent for weeks and weeks. Yes do any questions that you can lay your hands on but more importantly study the notes learn them inside out. The exams are passable, looking for shortcuts is just waisting your time.
Sorry to be blunt!