You can override the default Stingray Physically Based Shader node so that your custom version of the shader is created instead.
- Click Open ShaderFX in the Stingray PBS Attribute Editor and build your shader network.
- Save your shader network as Startup_PBS.sfx in \Users\<username>\Documents\<mayaVersion>\ShaderFX\Scenes\StingrayPBS.
Now your custom version of the shader loads when you create a Stingray PBS node.