Hi…is my first post so maybe the question is qite newbie…well is that:
i have downloaded a SSS material that i have found in the web it is made by nodes …when you open it in a window apear Suzan and in the other the nodes…i was trying to use this material in other mesh found in the web (from blender too). but if i open the mesh file the material node one disapears and if i open the material into the mesh one is the mesh one what dissapears…there is a simply and easy way to save and apply ready made node materials?
i had found a post in a forum talking about to use the link function…but dont seems to work…more google search show no answer.
somebody knows a answer?..everybody builds the materials foe each use from cero? (i think that this is impossible …only make one takes hours)why there is no a simple menu like ADD-MATERIAL, MESH, ANIMATION…ETC…
What you want to do is open up your model in Blender and append the node material into that blend file. (SHIFT+F1 > [navigate to file] > MATERIAL > [node material])
Hope this helps, and welcome to BlenderArtists 
–Robo
you may also have to group most of the nodes except the render one on the left
then you’ll be able to append group node to another file
but still ahve to add the main inputs
happy 2.5
i can group the nodes …i left out the output one…(is that correct?)…but when it done reading the manual tells: Once you have appended a NodeTree to your .blend file, you can make use of it in the node editor by pressing Space → Add → Groups, then select the appended group. The “control panel” of the Group is the individual controls for the grouped nodes. You can change them by working with the Group node like any other node.
but how to append the node tree? ( is the group?) to the blend file (the one from the group comes or the final i want to put?)my god, was so difficult to put a save option in right button or in the node menu…
not certain about this node tree
you can upload the node group then you ungroup and add the missing part and it should work fine
salutations