Also is there something that will mirror uv's not just verts. Another really habdy script is morphix 2, which re orders the vertex index to match another mesh, as long as they have the same vert count/topology.
http://www.highend3d.com/3dsmax/downloads/scripts/object/mirrorVerts-3105.html i use this at work... it works great with symmetrical models, but if i remember right it isn't updated for the latest versions of max and may need to be fiddled with to make it work...
worked nice, but not how i expected/wanted. I ended finishing it up on Zbrush, with subtools, different transparency values, the Zbrush softselection like way to work and a good symmetry it worked better then any max script. Thanks anyway, i guess it is another one to add to max fault :\