http://www.infinity-vision.de/blog/render_optimizer
The Render Optimizer does a lot more than just turn on unified sampling, and Thorsten has several tutorial on the various subcomponents.

If you are overwhelmed by the number of tabs on Thorstens version, Artur also independently has a slightly different version on his site, called "mr Options Manager", which you can find here:
http://dimensao3.com/al/

I will be updating this post w. some tricks-and-tips myself shortly.
For now, Enjoy Thorsten and Arturs cool work!
/Z