UV mapping snap multiple points at once

Is there a way to snap multiple UV points at once instead of having to snap each point individually when overlapping UVs that you want to be identical.

here is an example of my problem:
i want to overlap these two UVs

however as you can see they do not overlap perfectly, all the points need snapping.

http://i47.tinypic.com/eu59gg.png

thanks for any help, Ken

How are you unwrapping the UV meshes?