Procedural 4

i got this node called Procedural 4 from http://remingtongraphics.net/, and having trouble using it… it cannot be installed via user preferences = add-ons. And when I double-click it it opens up it own project… how do I apply (import) it to my own projects ?

This is not an addon but a blendfile, you need to manually import the materials by appending from the blendfile.