I know where you are coming from Lee, I started mine with London Guildhall two months ago. As the Instructors at my local flying club have said "it's a whoop you have to jump through". My course tutor is excellent, I e-mail him with questions at least twice a week.
Determining the bits you need to know is the tough bit I think, and I think the practice question papers are a very good guide as to what you need to know.
Incidentally my notes have included in them a look at some real aircraft system to kind off "bring it all together" at the end of a section. Do yours? If not and you would like a copy of the bits, drop me an e-mail at
[email protected]. I have notes on 737 hydraulic systems and 747-200 electrical system. Also some stuff on 767 airframe. If its of anyhelp get in touch and we can sort something out.