Easy way to keep track of your percentages is to use
http://caloriecount.about.com
You plug in what you eat, and it will break out the percentages for you.
Basically during phase 1, you're trying to keep your protein % very high (50% ideally), carbs around 30%, and fats low at 20%. The reason you want to keep your carb % so low is that your body has glycogen (carb) storages already that you're wanting to burn off. Most of your initial weight loss will be water and glycogen storage.
As the program progresses, you simply increase your carb % in order to fuel your body properly.