How can I use the CGP in DVDFab 1.5?

How can I use the Create CGP in Other Tools of DVDFab 1.5?

It seems it’s very differenet from the old 0.15 version of DVDFab, which lets you select the CGP file.

What should be specified in DVD1, DVD2, DVD3 and End?
How can I specify an existing CGP file to replace the default one?
How can I create a CGP file?

Please help