I don't know if this will help but...
My Quinn is just over four months old and we recently switched him from an eat to sleep routine (AES) to the EASY one.
I used to feed him to sleep for all naps and at his bedtime. I first tried changing the bedtime routine. Instead of doing the feeding at the end of the sequence, I did it at the beginning - eat, pajamas, read, lullaby instead of pajamas, read, lullaby, eat. If he fell asleep at the breast, he ending up waking up when I changed his diaper and put him in his pajamas. The problem I then had was....well then how do I get him to sleep? I ended up walking him around and shushing in his ear, singing to him...whatever I could do to put him to sleep in my arms. Then I would lay him down in his crib already asleep.
This worked for a while, but he was gradually getting heavier, and I was getting tired of doing this four or five times a day...and I realized that I had simply switched props from the boob to my arms.
It was at this point that a friend told me about BW. We are now on day five of the EASY, PU/PD plan. And although it was very hard the first few days, it has gotten much better - using PU/PD to teach him to fall asleep on his own, and then feeding him when he gets up, except for the last feed of the day is not after his last nap, because that would be too early, instead I feed before the bedtime routine...
Although we tried to first change the feed time and then teach him to sleep, in the end it made more sense to do both at once. In the end it might be easier?
Been there!
Good luck,