Hi Joomleb
Might get a chance to add an example later. it in the meantime (and from memory):
A - What is the "#_cck_core.pkb" table ?
Seblod has the table #__cck_core
When you create content using seblod, an entry is created in here. The id in #__cck_core is the cck::453 number you see in articles etc
One of its columns is pk: this is the id of the content
One of its columns is pkb: this is the id of the article being used as a bridge
So....
you have to create your content ie user, and then ...
... you create an article, ...
... and then grab that article's id and update the content ie user in #__cck_core.pkb
B - "with id of associated article id" = this mean the article has yet been created, when ?
No, you have to create it
C - another work of the User Bridge plugin is to create the Article profile URL, in this case, When it will be created ? No idea about that.