[horde] convert preferences

[alois blasbichler]

Hello list 
 
We are upgrading from Horde: 2.2.4  (IMP: 3.2.2 ...) to
 
Horde: 3.0.7 
Imp: H3 (4.0.4) 

With Horde 2.2.4 my preference-Container was LDAP (openldap) and with my new
Horde 3.0.7 it should be my Postgresql-DB.

Is it possible to automatically (with a script) export this preferences and
import them in my new horde? Or not ?
And somebody have a script ore other hints?

Thank you
luis