Modular pawn and swapping body parts

Hello
I want to ask if modular pawn is method to swap parts of the body or it overlaps main body?
I want to swap body parts i know i have to divide main skeleton and every parts has to share skeleton mesh, but i want to save on memory so only one layer is diplayed instead of one object onto another.
Some guy from net told me to use 'set mesh" to achiev that.
Anyone could guide me a litle?
greetings

You could create an invisible skeleton mesh and from the start attach all of the base body parts through sockets as if that was the original body and then swap them out whenever you like. Or you could use a base body and then attach clothes,armour etc that way. Really depends what you want to achieve.