Neither can I, tea! 
Nigella - there are always three different Bootcamp threads on the go. One is the weigh-in thread, www.mumsnet.com/Talk/big_slim_whatever_weight_loss_club/1467223-Bootcamp-Week-4-Come-and-weigh-in-here-Newbies-very-welcome-too?msgid=31658948 one is a general chat thread www.mumsnet.com/Talk/big_slim_whatever_weight_loss_club/1467233-Bootcamp-Week-4-Come-Whine-With-Me and the last one is a recipe thread www.mumsnet.com/Talk/big_slim_whatever_weight_loss_club/1447493-BIWIs-Bootcamp-Recipe-Thread?msgid=31605679.
The idea of Bootcamp is to make low carbing as simple as possible, hence the rules. Print them out and follow them to the letter.
In terms of your meals and relative proportions - again, don't worry about weighing or counting anything. The idea is to make the whole thing as easy and painless as possible. IMVHO, the minute you have to start weighing things, it leads to obsessing over food, which is not healthy at all. That said, if it's new to you then it can be helpful in the first few days weighing your veg, just so that you know how many carbs are in your portions.
There are no guidelines about how many carbs you should have a day. If you focus on eating veg/salad with 3g carbs or less per 100g, then you should be eating a sufficiently low number of carbs. (But for your information, the first two weeks on Atkins, called Induction, you are restricted to 20g carbs per day)
I have a spreadsheet which is designed to work out your carbs for you - all you need to do is put the weights in and it will tell you the totals. If you would like a copy, just PM me your e-mail address.
The absolutely key thingis that your carbs should mainly come from vegetables and salad. For this reason it is a good idea to cut out/down drinking tea/coffee with milk. Milk is very carby, and a few cups of tea/coffee per day can mean you are actually consuming a high number of carbs. If you can bear it, drink them with cream instead. If you can't, then try and restrict yourself to a couple of cups per day.
The best way to decide what you're going to eat is to start with your protein component - meat, poultry, fish or eggs - and then add veg/salad to it. Try and choose fattier meats - belly pork rather than pork fillet. If you choose lean meats, like chicken breast, try and cook them with the skin on, or fry them in butter, or serve them with a dollop of mayonnaise.
The Idiot Proof Diet is a really good low carbing book, and the recipe book that goes with it has some fabulous recipes in it. But if you're going to buy the recipe book, please buy the diet book to go with it - it will give you a better idea of the thinking behind the diet. I would also recommend that you try and buy/borrow a copy of Dr Atkins "The New Diet Revolution" as this is much better in terms of explaining the science behind low carbing.
But above all - you will enjoy your food. When I very first started low carbing, my DH looked at me horrified, as I tucked into plates of bacon and eggs for breakfast - he couldn't believe I was going to lose weight eating that way! Truth be told, neither did I, and it felt like a real leap of faith doing it. But you do lose weight. You aren't hungry and it is so liberating, after years of calorie counting and obsessing about what I could/couldn't eat every day.
Just pile into Bootcamp - read up on it, and get yourself ready to start next week. It is vital to plan things on this WOE (way of eating), so give yourself a bit of time to decide what you're going to do/what shopping you need.
And good luck! I look forward to seeing you in Bootcamp.