does she appear to be in pain? do you think it is a break or a dislocation? i was going to suggest a splint if it was on her knee...i found a picture online of a chinese water dragon that had a dislocated leg at the hip and it had a splint on--wrapped around the leg and the tail to prevent movement. i don't think that would be a good idea for a gecko though. i would say to take her to a vet right away. if it is a dislocation, sometimes they can just pop it back in place.
also, have you tried posting in the kingsnake health and breeding forum? i don't think it is frequented as often as this one, but you may get lucky. there seems to be a lot of very knowledgeable people on there.
i wish i could help more...
amanda