The rules are all explained in the book but we have all had to 'make them work' for us. For example the daily bread ration is supposed to be 40-60gr only - so that's actually ONE slice of British wholemeal bread, not two.
You can have ONE carb meal and ONE Gala per WEEK for the first half of Conso, and two for the second half.
Best carbs to reintroduce first is wholemeal pasta (according to Dr D who thinks potatoes are 'worst').
Atropos already said it: Conso = Cruise plus carefully controlled (!)extras. Start by weighing the cheese and bread then you'll soon get the hang or sizes, try not to measure everything or you'll send yourself mad! A mini babybel cheese is exactly 20gr...
More advice: Galas - esp the first one, don't go overboard on the richness of food you might actually end up feeling sick! Generally - think of a Gala as a 'normal meal' where you can eat the food you might want (like the peas, or sausages for example, or bananas!), don't see it as an extra over the top celebration every week. The 'Gala' meal does not have to be dinner - you could have a nice breakfast for a change.
If you carry on losing, you can gradually increase things - but not by adding chocolate and cakes but by having two fruit for example.