sleep begets sleep.... so don't panic about your DD sleeping "too much" during the day. She will become more relaxed in the evening if she gets good day sleeps.

I went to sleep school twice (day stay & week stay)... and the problem with my DS was that he was not getting enough day sleep. He would then be overtired in the evening and a right pain to get to sleep. When he finally exhausted himself (crying/screaming) - he would sleep quite well during the night.

After the first sleep school visit, they taught me to get him settled during the day. I thought it was wonderful that he was sleeping for 40-45 minutes during the day (2-3 times a day).... as that was 30-40 minutes more then he had before. But he was still upset in the evenings.

At the week stay - I discovered the 'sleep cycle' where babies will usually wake/stir after 40-45 minutes, and it's best to resettle them (or let them resettle themselves) and they should sleep in blocks of 2-3 hours when young, and 1.5-2 hours as they get older (after 12 months for ex). Once my DS was getting 2-3 hour day naps... he was a dream to get to sleep in the evening.... a totally different child.

Personally, I would never wake up a sleeping baby to stick to a feeding schedule. The baby will wake up if he/she is hungry.