Sorry Nikki missed a few of your questions.............
Yes you can do the diet just on soup and porridge, after two weeks the bars are quite nice as well. you don't have bars prior to this as they have a slightly higher carb content and could knock you out of ketosis if your in the early stages of the diet.
I haven't found excess skin an issue, yes you loose weight remarkable quickly but you'll also find your energy levels suddenly increase, you'll find your doing more than you use to, be it housework, going for a walk, that kind of thing, which will encourage you to tone up any loose skin. I do 1/2 hr of Wii Fit Plus every morning and just got myself the 30 day shred DVD to try.
I too am an emotional eater, as you move up the steps of cambridge diet from sole source through to maintenance, you gradually add in specific amounts of certain foods depending on which step you are at, during this process you will learn what you can eat plentifully and what needs to be restricted and why. hopefully after a period of time on sole source removing food from your daily life as such, you should adapt to not use it emotionally.
If anyone finds it difficult sticking to sole source, after two weeks you could move up to the 810 plan which involves eating real food as well. However I found I managed better on SS because the moment I introduced real food, I found it soo hard not to fall face first into the biscuit tin :) but its all down to what works for you really.