we went straight into it, though modified as we dont co sleep, yep they get angry dont they for us it got better after about 8 or so nights, it was hard. she started to sleep longer, our rule is to resettle before 4am but feed after that time, she wakes anytime from 3.30am onwards currently so i feed as i cant be bothered arguing!, im hoping overtime she'll drop that feed.
DH has more success resettling as she thinks im going to feed her.

the otehr thing to do is to get onto the jay gordan website and scroll down in the night weaing area and you can post questions! a lady named Cheryl will answer your question