They use the Cessna (Kings School) multimedia system for the IR and CPL.
Definately advise you get these and get them done BEFORE you do any flying.
I studied these and did my IR at the same time and it was a high workload.
However, when I did my CPL I got the disks before I started the course and it was far easier to study before you do any flying, so you can just concentrate on the flying.
Didnt get any disks for the Multi flying but advised to read the book "Transition to Twins" which is a good read for multi flying, But as I said earlier Jason does spend quite a bit of time going through the syllabus.