Importing One *.mph geometry into another *.mph file

Hi All;

I want to import *.mph geometry into another *.mph model.

Example: You create a model for single phase flow. Now you want to use the same geometry for two phase flow model. You do not need to spend time to create the same geometry into another *.mph file.

How can you get the geometry from the first file and use it for another practice model. Instead to create the complete geometry again.

Thanks