I did this a year or so ago. And you will find that there are other problem that will happen here. The first is that the boot uppers actually are part of the lower leg. So you pretty much have to hack the hell out of the figure anyway. The boots end up having to be cut into three pieces (Boots, feet, lower leg) in a program anyway, otherwise they flex wrong. So I don't think you are going to get a clean prop-replace solution. If you blouse the pants into the boots it takes care of a lot of problems with having the cloth and leather overlap cleanly. The last part is then hand editing the final obj to put the materials back in. This is a lot of fun (NOT!) Or you can use the perl utilities I built to do that. Kevin