I tried a way around. Somewhat close to what I want.
I created a CGP with the 1st, 3rd & 4th image as black and the 2nd image as “Insert Disk 2”.
This gave “Insert Disk 2” at the end of play of Disk 1, but gave black screen (seems as if nothing) at the beginning of Disk 2.
Now one more thing. It seems the CGPs for “Custom Copy” are different or differently made. The normal CGPs created using TMPGenc, Ifoedit & DVDFab route do not show up in “Custom Copy” list. Aways only two of them “Black Screen” & “DVDFab” shows up. Why??
DVDFab CGP is different since apart from, may be 4 images, it also has “Content Removed” image in it. How was it made??
Please let me know since I want to achieve the same thing with “Custom Copy” mode.