I'm not a pro at Maya, but can't you make a cluster of CV's? I don't know about lattices as was said before, but the Instant Maya book has some stuff about it in there. You basically select the CV's you want to move, choose Deform>Create Cluster, then fiddle around in the Set Driven Key window to go from the original position to a different position. After it's all said and done, you just can manipulate the clusters easily. If you want more on it, IM me, send me a privatemessage, or buy the book. Some of the other ways to do it might be better, though.