[Exim] Exim4 with ldap

I´m using Exim 3.35 with mysql support. i want to upgrade to exim 4.3x with
ldap support.
i have install exim 4.34 with ldap support( thx to ametzler for the debian
packages). exim 4 works with local user very well.
i have read the exim online dokumantation, the exim book and ask google, but
i don´t have any idea how to configure the transporter and the router.

thx

kai