Rather than take time off work, I got a home study CD rom (£60) from Down Under Tradies, and am going there on Thursday to do the exam (£180). Seems expensive but for not having to take time off work to study it's saved me hundreds. The CD rom has actually been quite good as a refresher but equally if the student is newish it guides you quite well through the regs. You are supposed to have had a certain amount of "led study" before sitting the exam.