How to Master/Slave switch, load balancing in CakePHP

I need to implement master/slave/load balancing into an existing site.

Does anyone use these (or other) implementations for master/slave switching?

The resources I found on how to implement master/slave into Cake:.

• (preferable) gamephase.net/posts/view/master-slave-datasource-behavior-cakephp
• http://bakery.cakephp.org/articles/view/master-slave-support-also-with-multiple-slave-support
• http://bakery.cakephp.org/articles/view/load-balancing-and-mysql-master-and-slaves-2

I'm getting number 1) to work most of the times but it has trouble with some of the joins.

I welcome new sources, hacks or mods for master/slave implementation as for now I can't get my head around it.

(Cake version I am using atm is 1.2) (I'm cross posting this on CakePHP's google groups http://groups.google.co.uk/group/cake-php/browse_thread/thread/4b77af429759e08f)