I imported the right shin, foot, and toes for the P4 woman into Carrara. Then I created a new vertex object. In the vertex modeling room, I created a cylinder. I jumped back out to the main working room for Carrara and centered the vertex object around the shin. I made certain to color the P4 woman shin, foot, and toes one color, and the cylinder another color. Then I just jumped in and out of the vertex modeler. I'd made adjustments to the vertex object, jump back out to check it for fit around the leg, jump back in and do a little more work, etc. It takes a little time, but with the vertex object a different color from the leg, I was able to see anytime I didn't get the fit right. The actual boot doesn't fit perfectly around the foot and toes, BTW. Since I knew I could turn those invisible in Poser, I concentrated more on fitting the shin, and then made the foot of the boot model match the style of shoe I was working from. The Poser foot sits flat, and these boots have a heel and bend upwards around the ball of the foot. You probably could bend the foot and toes to fit, but I haven't tried that yet. I did have to resize the final model when I imported it into Poser, but that was just a matter of scaling it to the correct size.