[doc55]

shka,
Thank you for your helpful post. I am just starting to use vBulletin and I'm gathering as much information as I can, so your comments are much appreciated.
I checked the cherusername api and I will be using it in my code.
However, the user save method, is not updating the username, that's why I'm using the database update.
When I checked the default profile edit page on vB, there is no option for users to change their username. So I think vB by default, doesn't allow this (except from the AdminCP) and therefore the save function doesn't updat the username. Unless I'm missing something.