Copy a Pre-Defined Page into a User-Defined Page (UDP)?

Answer courtesy of Pankaj Dubey:

Log into the application with your browser.

Navigate to the User
Defined Pages interface.

Click on
the Page Flow of the Pre-Defined
Page.

Click the "Duplicate Page
Flow" button in the bottom left of
the screen.

A User Defined Page
(UDP) will be created.

You can point
the routing rules to this UDP.

**

Note:
You may find that the "Duplicate Page Flow" button is grayed out.
This indicates that it is set to Read Only status.
Using a SQL query, you can unlock the button:

select * from page_flow;

then:

update page_flow set READ_ONLY=0;