We used Tizzie Halls book as well, started at about 8 weeks and we just went cold turkey with the dummy. It was 3 days of a not so very happy bubba but after that he didn't even miss it. He only has it now if we are trying to stretch out the time before his next feed but even then he is no very interested in it.

I know its hard but its totally worth it in the end, he is a completely different bubba so much happier, he sleeps 4 hrs during the day (2 2hr sleeps) and sleeps from 7 till 7 with a dreamfeed at 10.30.