On the 'zone is too low cal' comments:
I'm not sure if it's covered in the CFJ this month, but you are supposed to add fat blocks until you reach your designated calorie level. So it works out to 7-900 calories, PLUS WHATEVER YOU NEED. Once you reach your body fat percentage that you want, you add fat to the diet to make up for the extra calories. You could even add the calories at the start, the weight loss would be a slower process. It takes practice to figure out what block ratios work best for you. No-one is telling you to starve, in fact that's a big point of the zone - no hunger.
If 'small female' is too little protein/carbs for you, add more protein. It works out usually to be about 1 gram/pound of lean body mass. I've been zoning for about 5 years, and it's the best diet I've ever tried, bar none. The only thing I don't like it for is putting on large amounts of fat.