my DD is 15 months at present, my new babe is 5 weeks, both on GF routine with great success...but it doesnt work for everyone that way....
i have both up at 7am, dd1 is happy to play til half seven whilst i feed DD2 then i put DD2 in play pen whilst DD1 has her breakfast. Sometimes i sit on the couch and feed DD2 whilst reading a book to DD1 with the other hand! it is possible lol. DD2 at 5 weeks gets tired about an hour and a half after being up so although it is earlier than routine time i pop her down and then just get her up at next waking time which is 10 o clock. DD1 doesnt have a nap in the morning now so whilst DD2 is sleeping that is our time to play and make sure she doesnt feel left out. DD2 is then up again about 10ish and has a feed whilst DD2 potters about with her toys or watches her baby einstein DVD. i then lie he ron play mat and encourage DD1 to hold toys over DD2 so she can watch them. I top and tail DD2 about 10.45 ish which helps kep her awake and encourage DD1 to help, by giving her some cotton wool and letting her wash DD2s belly and put the tac on her. she also puts the dirty nappy in the bin for me. DD2 then goes down about 11 sometimes 11.30 (again not exact routine times) and at 11.30 i give DD1 lunch and we have an hour to play before she goes to bed at 12.30. Both get up at 2.30 and i read a book to DD1 whilst she drinks her juice and i feed DD2. at about 3.30 DD2 is ready for a nap so i go to the park, that way i can play with DD1 whilst DD2 sleeps. We head home for 4.45, DD1 has her dinner as i get DD2 up at 5pm and give her a feed sitting at the table with DD1. at 5.30 DD2 has her bath, again DD1 helps. sometimes i put DD1 into the bath after DD2 has been all dried off and laid in play pen...other times my DH does her about 6.30ish when DD2 goes to bed.
The main thing to remember is that newborns are really sleepy and will very rarely be able to stay awake as long as the book suggests thats why it say baby can stay awake for up to two hours meaning earlier is fine, but no later. so if your babe gets tired at say 8am instead of 8.30 as the book say for newborn routine, just pop her down then and dont worry that she is getting extra sleep...she will need it.also newborns as you knwo can take donkeys to feed, dont worry if you go over the routine times...just adjust it accordingly.
with a toddler, it helps to get them a little doll that they can copy you with and make sure you try to fit in as much one to one time as you can. also try to stick to the same boundaries etc that you had before...and that her routine always comes before that of your newborn. reason being you can deal with a newborn that wakes in the night but it will be hard if your toddler starts that as well!
work toward the routine very gradually, as you know from DD1 it takes time and patience. I dont know how you feel about dummies but i use one with DD2 to make sure she is happy inplay pen whilst i sort DD1 out...dont like to hear her cry.
Most importantly be relaxed about it...dont stress if your newborn is nowhere near the routine, he.she will be eventually, just concentrate on keeping your toddler happy with what she has known all her life...her routine. its such a big change to them having another baby.
HTH xxx