Okay...I have them under My Daz Library(yours probably says something different it's wherever you have you Daz Content) /Shader Mixer/Pens...but you could probably put them anywhere.
To use it load the shader mixer tab and dock it wherever you want it to go. You will need to load it into Shader Mixer and then apply it to your model before saving as a shader preset.
I don't usually use the brickworks section so I normally have that closed and just play with the network.
To import the network in Shader Mixer:
Go to the menu in the top, left hand corner of the panel.
Click on open shader, navigate to wherever you placed the shader and double click or click on the shader and click open.
This is a fairly simple shader that I was playing with to create make up masks. Now it won't work straight out of the box for you unless you have the masks from Kobalt...so the first thing you need to do is set it up for yourself.
In the top right corner of every brick is a little white triangle click on this and unhide the parameters so you can look at each brick.
You'll see that there are two initial bricks on my setup they are on the left hand side but yours will probably be on the right hand side as I've customised my setup.
These bricks are what you normally would see in the surface tab and can be treated the same way.
The next node is a mix brick and you'll see three options Alpha, base and layer. The alpha is the one that you need to plug your mask into. If you're only using one mask per surface then this is the brick you will need to plug it into with your other image plugged into the base option.
This set up has been customised to allow for two masks which is why there are more bricks plugged into the base then just an image map... instead I have another mix brick which this time has 3 inputs. Again the alpha has the mask and the base has Dawn's texture map for the face. Then on Layer I have an edge blend brick which tells the network what colour to plug into the alpha area. In this case by using an edge blend brick I can choose two colours and then using the attenuation strength I can vary how the colours are going to interact.
You can vary how the mix block works by playing with the type and operation.
To add an image to the image block Click the triangle on inputs and you should see the name of my image, click on this to change it.
If you get stuck...let me know.
@NapalmArsenal, I know all about procrastinating...