I use lithunwrap and create a 1map layout with the face, limbs, and body each in a quadrant. Then resize to 8192x 8192 in photoshop. This gives you 4096 px for each major map. This way you have all your maps on 1 page. you can use this in PS and Z brush this way to create a total body and head map. and allows you to create perfect seams. With the line map underlying the color maps pick a pixel that is positioned in an obvious spot and make a 1 pixel wide registration mark. Then when you break this back apart for Poser you have a way to line up your maps properly.