hm.. to do that will take some knowledge of maya. but wat i suggest u do is download the free tutorial of the skeletons. or if u have points download the tutorial in moving hand.
but basically you have to use the joint tool found in skeleton menu and put it inside the hand. From then on the animation will be much easier. (i'm very new to maya so i dont know how to make the hand stick to the skeleton, so when the skeleton moves the hand moves too , but this is all the advice i can give).