One way we got Twitch, our oldest girl, to start eating meat was to withhold food for a few hours till she was really hungry. We then rubbed a piece of kibble with raw chicken and gave her the kibble. She recognized the kibble as food so ate it, but it being rubbed with chicken introduced her to the new flavor. We then tried wrapping a small piece of chicken around the kibble piece and gave it to her. Once she tried that, she was hooked and hated her kibble after that.
Another good method is baby food meats. They don't have to chew it and it introduces them to the new flavors.
If you are serious about switching your ferret to raw, try this forum. They are really great people. I am fuzzymom on the forum.
www.holisticferret.proboards80.com