I think you have totally missed the point of this CD. It's not supposed to educate you! Please don't dismiss it - I had a wonderful birth and put it down to this CD (and book).
If you read the accompanying book Effective Birth Preparation: Your Practical Guide to a Better Birth (and I highly recommend it - very practical and much more detailed and helpful than the booklet that comes with the CD, it explains how it works and ways to work with your body), you would discover that the key to a calm, natural birth is all about relaxing, and detaching yourself from your "thinking" mind and removing anxiety - exactly what this CD achieves, especially if you listen to it 20+ times. You don't need to know what's going on (and there are plenty of other books and NCT classes that will tell you about this if you really want to know) - your body already knows what to do, you just have to let go and let your instincts take over. Just think about it, women in comas, and in 3rd world countries will give birth often without help, without having been educated about what's going on!
Please give it another go. I recommend this to every pregnant woman I meet! After using this I gave birth to an 8lb 6oz baby without drugs (first pregnancy) and the midwives said I breathed her out. It was hard work and certainly not pain-free, but nothing I couldn't cope with, and I can honestly say I'm really looking forward to doing it all again in June! How many mothers can say that?!