How to make custom CGP?



Hello All in this very noble forum :wink:
Just recently read that from v 3 DVD Fab onwards you cannot use old CGP’s in “customize” mode. Any advice how to make a new format compliant custom CGP’s for “customize” mode ?

On that note - I would greatly appreciate some kind of refresher on how to make old type CGP’s as well - using TMPEG or similar.
In particular I was having some aspect ratio issues (CGP’s not displaying proper aspect r.) I am into both PAL and NTSC
Any help will be greatly appreciated.
Thanx a bunch