You can just right-click on the Unwrap UVW modifier in the stack and go "Copy", then select the object you want to copy UVs to and right-click over its modifier stack and select "Paste".
I did this with max 9 for my dominance war entry, my recommendation is on each object and select all polys and set a material id eg. head = 1, torso = 2 etc etc then attach all and in uvw unwrap modifier you can select which material ID at the bottom of the display window and this lets you unwrap individual items much…