howto use existing ldap with kolab

[hehe]

hi,

i'm trying to setup kolab2 with an existing ldap server but i still missing
the part to configure it.
the kolab server is on CentOs 4.0.

where do i get schema file for kolab???
i still rather confuse in kolab because i get not much documentation about
it.

i have to run ./obmtool kolab twice before i can run
/kolab/etc/kolab/kolab_bootstrap -b ?
is it not well suited with CentOS 4.0 or what ???


thanks in advance