How do I install the network rendering plugin?

Copy the plugin file matching your version of 3ds Max [Pencil+4_20xx_ntr.dlt] (or Pencil+3_ntr_20xx_64.dlt for Pencil+ 3) to the 3ds Max [plugins] folder.

Example installation path: C:\Program Files\Autodesk\3ds Max 20xx\plugins\