Adding a subtree to the personal address book

[libresurf]

Hello,

I'm looking for a way to add a subtree to my personal address book.

My address book was automaticaly created by kolabwizard. It is a ressource 
shared by the IMAP server via KMail.

In Kaddressbook, I found no way to create this subtree.
So, I parsed the LDAP tree with luma and found no entry for my address book.
My idea was to create a subtree in the LDAP base.

How can I do it ?