Two things you want to avoid when you are dieting (and this is where people, esp women screw themselves w/ the idea of "i have to starve myself to lose weight") -- if your protein is not high enough, you have nothing to build muscle with - women often think in terms of "I have to drop fat" but don't think also in terms of maintaining or building the muscle mass they have, even saying "I dont' care about losing muscle" - when its a combination of bodyfat & muscle that makes you look how you look. The second is if you don't eat enough in general, then your metabolism will slow down to accommodate the lack of sufficient nutrients, stallign out your progress and possibly catabolizing muscle.
Don't worry about the grams of each macronutrient - the important thing is the total cals & the ratios of each.