Well, I've never done this on purpose, but still: the way I see it, cats are shameless opportunists. If your friends stop feeding her, and you start feeding her, she will move. I'm guessing the hardest part will be for your friends to stop feeding her, and start turning her away. But the worst case scenario is that they move, and the cat comes back to an empty house, and goes hungry until she finds another source of food, hopefully you.
How about they start feeding her less, or something really boring, while you start feeding her something she loves? If you call for her and handfeed her something like raw chicken (or something more pocketfriendly :-) ) whenever you meet her she'll learn to connect both you and the call with good food. I think she'd come to your call at your house if she's hungry and within hearing distance quite fast.
I'd be careful about carrying her to your house if she struggles though, they're excellent at remembering who forced them to do what. And bear in mind that you may live in the middle of some other cat's territory.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett