Yes, well its an addon by Fenric.  Its called the Multi-Shader Editor.  http://fenric.com/wordpress/store/products/multi-shader-editor/ is the direct page, its also part of a bundle at Daz as well callled Shader Power tools.  I have a lot of Fenrics addons and they are real time savers.    Here is a list of many of them http://fenric.com/wordpress/store/products/category/carrara-plugins/  there are packages at Daz that may have others, or they may be bundled.  Hope that helps.  there is Advanced Shader Tweeker as well from him.