Generally it's not the idea to post the presets themselves here or screendumps, but I can understand you need to give some info to get your problem solved.
You can PM/mail all of the NWDA members about how to use the presets/objects etc.
The solution is to connect your "compute terrain" node to the top "surface layer" node in the "dirt bump" group/bookmark.
This surface layer is named "plug compute terrain here" or something along that line.
The bottom node of the node-set needs to be connected to the input of the shader which your compute terrain originally was connected to.
This way you have literally inserted it.
Hope this helps, otherwise let us know

Cheers,
Martin