Michael 2 and Michael 3 have different mapping.  You'd need the Universal Texture Converter utility (plus the Michael 2 and Michael 3 plugins) to convert the zombie pack's textures to Michael 3.
 
The poses may need some slight adjustment when applied to Michael 3, although they'd probably work better with the M3-to-M2 figure, which has the same proportions and joint setup as Michael 2. The facial expressions might not work properly at all, depending upon differences in morphs.
 
Actually, your associate would probably find it cheaper and easier simply to purchase Michael 2. DAZ is running a 50%-off sale right now, and M2 can be had for $10-15.