Replace the schema.xml for the Master with your new version
Stop and restart the Master so it knows about the new schema
Rebuild the Master index with the new schema.xml
Careful - the normal script that does this rebuild restarts the replication at the end. I need to fix this since it only takes a few seconds to replicate.
bash$ php virtual_library_rebuild2.php test no-replication
Test the Master to see if the new schema.xml is working as expected. Go back to step 2 if necessary.
Start up the replication again
Replication will copy the new schema.xml to the slave
I *think* it's not necessary to stop/start the slave since the new indexes get copied by replication