http://www.neuron.yale.edu/ftp/ted/book ... xedref.pdf
shows how to use the hoc file emitted by a NetWork Builder to create a
large net. An indexed version should be available in a few days, but
the narrative is linear and cumulative, so lack of an index should
not be a serious problem.
Chapter 11 presumes familiarity with material in chapters 1, 4-10,
12 and 13.
Of these the most important for a beginner would probably be chapters
1 (general intro to NEURON), 5 and 6 (specifics about modeling
biological neurons), and 10 (key concepts underlying NEURON's
strategy for implementing synaptic connections).
12 and 13.are intros to basic hoc programming, and object oriented
programming in hoc, respectively.
4 is all "about numerical integration for the neuroscientist."
9 is the authoritative reference on NMODL (helpful for answering
questions that might arise in chapter 10).
7 and 8 deal with the run time system and initialization and how
to customize them.