Howto create a new File Type copying from existing one

Hi,

Using IJ CE 13.1.1, I would like to create a new File Type, then register it with a new file extension, and define all the keywords for syntax hilighting.
The procedure is described in IntelliJ documentation: Creating and Registering File Types

However, to make the job easier, would it be possible to create a new File Type definition by copying from an existing File Type? Then aftwerward I just need to make a few modifications to customize the new File Type.

Thanks in advance for any help.