HELP: Oracle advanced replication

Folks, I need to setup Oracle Advanced
Replication (multi-master) with some custom collision resolution methods.

Unfortunately, Oracle does not include a replication setup wizard. Has anyone experienced setting up oracle multi-master replication. Is it straight forward or does it require a PHD :-))

Any suggestions/advice appreciated.

Thanks and best regards.
Furkan Khan
P.S Also, does anyone know how fast one can replicate

       the db, is it under 10 milliseconds per transaction or
       more (this assumes a fast link between the replicated
        sites).