I've got the make you slim cd. Not skinny yet but well rested with the falling asleep within two min of his starting! Don't bother with the shakes unless you plan on sticking with it your whole damn life. As soon as you start to eat normally again you'll put it back on. Good luck!
Paul McKenna does help you get into the right frame of mind to diet.
With respect to the shakes, not sure I agree that you'd have to stick to it (the shakes) your whole life, but to make sure the weight stays off you'd have to plan to stick with a low carb/low calorie maintenance plan fairly long term - but this is probably the same however you loose the weight. Don't see the point in the shakes really, unless I suppose you have masses to loose, why not start with the low carb/low calorie plan now?
His way of thinking is based on NLP and has really helped me "re-programme" my mind to only eat when physically hungry and stop eating when physically satisfied. I think my daily food intake has gone down by half - perhaps even more - and I've lost 2.5 stones since March. I'm a real foodie (it's how the weight has crept up) so it's amazing to me that a) I think less about food now and b) when I think about it, it doesn't necessarily compel me to eat.
I like it particularly because if I do overeat at a sitting I simply tune into my hunger (my belly) and 99% of the time I don't need to eat much for the rest of the day - in other words, if you slip up and you truly listen to your tummy then you'll naturally find you'll eat less (if at all) later on in the day.
I like it best of all because there are no food restrictions at all.
I tried Slimfast shakes once but ditched it because I missed real food (dinner always felt a long long way away) plus, by restricting food I became obsessed by food!
Best of luck on your journey, whicever path you take!