Updating custom user profile fields

[Milorad]

could someone help me with a query to update the value of custom user profile FieldX for all users, please?

Also, is there a way to set default values for multiple-selection checkboxes for new members?

[Milorad]

*nudge

[SVTBlackLight01]

Check out this post for the first question. http://www.vbulletin.com/forum/showthread.php?t=106371&highlight=update+profilefield%2A

Nudge again for the second question.