i just want to add that you say she's crying for a bottle because she's hungry. have you thought about looking at this in sleep-training terms: perhaps she's crying because a) there's a new way of things in town and b) frustrated that you're not doing it the way she wants it. the pp is right, she *won't* starve, and until you start to withhold the bottles, her tummy will be too full of milk to eat properly.
plus every time you cave, just as with sleeping, you're making her cry for nothing, and it's showing her that if she cries enough, she's getting her own way anyway.
you mentioned a first sitting of breakfast at 6.30am? imvho that's a teeny bit early anyway. if i were you i'd draw up your day's routine, make one sitting for each meal, include two snacks, commit yourself to it, and jump in.
if you're having difficulties with early wakes, i'd skip on over to the sleep boards and see if an earlier bedtime would help with any of this. if she's overtired, she'll be more likely to react emotionally to the changes, kwim?
good luck! let us know how you do! {{hugs}}