Just to add to what Rick has said, the boolean operating can work but some times will delete small faces on the mesh its always a good idear to have a quick check after you have done...

Could you show the model you are going to use and what you want to do with it...........dave

ctbram did this tutorial see link................dave

tip animate boolean diffence - YouTube (http://www.youtube.com/watch?v=Mas3zm5U214&feature=youtu.be)