I'm afraid I don't have much advice for you. Just letting you know that you're not in this alone. I've had Kahlua for about 2 months now and she's still living in my bedroom because if she gets out, my other two get chased, fought with, and end up losing fur.

Since I don't have a baby gate to put up (not that it'd do any good since they could all be over it in two shakes), I've tried putting Kahlua on a harness and leash to let her out of the bedroom. And I'll fix up a plate of nice, stinky wet food for them all to eat from. The leash keeps Kahlua from charging, and since they all want stinky wet food, they're willing to get kind of close - even if they won't share the plate.

The only thing I can say for sure is to just be patient.