There will plenty of free and useful advice on here, I'm sure if you post the "unsure" questions, someone on here will answer it for you. You could try Pneudart on here for the interactive CD he is offering.......
The course I did in 2008, I did prepair for, learnt on the course and enjoyed it, my instructors were 100% all the way through it. If you don't know ask!! Better to ask what you might think is a stoopid question than fail the exam, I'm sure there will be someone else on the course wanting to ask the same question.
TJ