I want to create a live USB for Lucid Puppy (5.1) in Ubuntu, but I can't figure out how.

Acoording to the homepage of UNetbootin (http://unetbootin.sourceforge.net/) the program can't create a live USB of Lucid Puppy - it only supports version 4.0. Is there a way to make the live USB from command line instead?

What should I do?