first off, im a new mommy and DI dont have much experience... however, Ive read tracys book start to finish at least twice. Tracy recommends that you first start her out in her crib just so that she doesnt get used to having props such as a swing... but if its only for 1 nap i think it should be okay.
as for the schedual, i dont recall any 2 hr. schedual. try to gradually bring her to feed every 21/2 hours instead. Im just starting my little one on a 3 hour routine, but it is very hard. I kept with it all day yesterday, and finally in the evening she started to drink more milk, and her sleep last night GREATLY improved. im not giong to give up on it.
now for the chest issue, if you hace read one of tracys books, she explains that we need our little ones to be independant. this is a struggle im trying to handle with my husband. every time he puts michael to sleap, he thinks that hes overtired because he has a seven mile stare and wont leave his side and often rocks him to sleap. then the cycle starts over and continues for hours. now the thing is, babys go through 3 cycles of tiredness if you will, the first being that they get tired and show it by yawning and blinking. this is when tracy suggenst cuddle time if you can with your baby. getle, quiet time in the dark near the crib where you dont do much but maybe rock and humm to him or her, and when you see the little one start to stare off into space, this is when you can lay baby in the crib and don't stop humming, patting or whispering to him or her as you do, because you will have a smoother transition . now he or she will continue the stare for about 6 or 8 minuits and you don't need to wit for baby to fall asleap before you leave the room, uless it helps for the first few times you do it. gradually you will have him falling aleap on his or her own but just try leaving the room and listening for sounds outside the door. my little one makes noises as he falls asleap, so unless he stars to wine or cry, i dont go in there. but if he starts to whine, go in and pat his back ( inly untill he stops or it will become a prop) and then repeat the process. if he crys, pick him up and then try again when he settles down.