I'm not sure what program you're talking about... I'm assuming you'll need to ask your question in one of the following locations, since that isn't something people here would be experienced with:
I use the biped which I find simpler than bone fragments and use the Epidermis modifier after to management the way the body system gets altered. There are good tutorials in the help.
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.