C.A.
Hi L.,
You're right - it is a long transition process. Some days it seems like it's working and then others it just doesn't. I think that's totally normal. I'd probably keep it down to one nap, but maybe at first let her nap a little earlier than usual and keep the bedtime a little earlier as well. It will eventually even out - but there may be some rough days in there. I bet most of us have been there and can relate totally. You may have already seen this recommendation, but the book Healthy Sleep Habits, Happy Child by Marc Weissbluth was a lifesaver for me - I constantly refer to it when I have sleep related questions.
Good luck!
C.