this is tricky, and I am still struggling to do the same thing and I am dreading daylight savings.
I would only suggest to do it slowly, maybe push nap times, meal times, eveything forward by 15min every few days. however I would only do this if she is napping well. the 45min naps in and of themselves may indicate she needs a tweak in rouinte.
anyway, bumping you along, perhaps othere will have had some success.