I would use a rigid bind, and then use Set Driven Keys to animate all the hand. Use Custom Attributes in the Channel Box for control, or create a NULL and use that to tag your Custom Attributes.
Kurt has a small tute on here for Hand Controls go grab it and watch it. It will help
Chris (formerly R@nSiD)
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Winner SM VFX Challenge 1
3rd Place SM SteamPunk Challenge (May 2007)