mysql replicator

Hi, Im using php with mysql as my database engine. Anyone aware of a well-documented MySQL database clustering script that can be used to synchronize multiple mysql servers ? I tried the prometheus project but i have problems running it due to lack of documentation. Any alternatives? What I'm presently using is just a one-way replication script I found at http://testbed.fapenet.org/~omar/replicator where the master server cant update itself with changes made at the slave server; it was great for replicating a mysql server though... i need one that can be used for a full load-balancing setup so that my PHP sites can query and update any db server and still get synchronized data. Thanks for any pointers. SME