This script handles any tool you can find on http://justin-vfx.com
Add this file in your ./nuke/ directory's root.
import JFX_utils : this is what you need to add in your menu.py. You can now paste any .py or .gizmo files anywhere in your ./nuke/ ! (including subdirectories) You will find all the tools in the top nuke menu at "JFX Tools". No need to restart nuke once a file has been pasted, just hit refresh!