The only purpose of this video is to show you how to approach setting up a mirrored UV set for games (or other reasons) using 3d max to simply get a normal map without any issues at all.

If you try simply overlaying the left and right hand UV sets the you will in many cases run into problems as you are then effectily using overlapping UV's (which are a bit of a no-no for digital sculpting as a general rule.)So this video shows you what I think is the simplest way to approach this problem.