As best as I can tell, you put the file in the Program Files/PhotoVCarve/PostP directory and it should show up in Photo V Carve for your use.
I also found a post on how to have it work in mm instead of inches:
Millimeter versions can be created by editing the files, changing the G20 to a G21 and saving the file under a new name.
The file is specific to the PhotoVCarve software, so you cannot use this file until you install that.