This is a good thread to check out for Instant Regeneration!
http://forums.sjgames.com/showthread...eration&page=4
Post 34 has a writeup I threw together for it. Post 13 has Ghostdancer explaining the idea
Note, my post 34 has an optional rule I think I would use (Rule Zero DM fiat and all that yay!), but it isn't very popular, so just scale the healing to the needed amount and life is good