Thanks jciconsult for your quick responce!
I do use the latest JBJuice
2 version for my export from Joomla 1.5.20-Legacy / CB 1.2.3 sites to the new Joomla 1.6.3 / CB 1.4.
But that still gives my a lot of problems with the fields with html-code which are not correctly exported and split across multiple colums.
I have managed to use CBJuice with some manual cut and paste for the first 40 users. They are now automatically created but with new user-id's (Because in the old site a lot of first users were deleted in the past)
The new site is not a migration but a totally new site, where I have created the same CB fieldnames.
I am not comfortable with phpmyadmin but I can coppy the 3 fields from the 250 users by hand if I have to.
For the user-id I have made a general CB topic
www.joomlapolis.com/forum/146-general/166958-can-i-change-the-joomlacb-userids
Do you say that I can just change the user-id's on the jos_comprofiler and jos_users or is there also a link to other places in the database?
Thanks again,
Nico