So far, the only third-level support provided is a few examples. First, one tells it what what modules to apply to incoming articles. Some modules take no additional information and just do one simple thing the same way to every message. Third, there are some pieces of information modules need to know which may be invocation-specific. For example, for a mail to news gateway, the same script and configuration file may be usable for every newsgroup being gatewayed, but each particular invocation of the program will want to tell the mailtonews module what default newsgroup to use.
Some additional documentation is also available in the doc directory.
You will probably have to do the last step as root. Just specify a LIB value to Makefile. PL when you run it. Translated, that means many features are missing or not fully implemented, and there are known bugs which have not yet been fixed. When using this release, please realize that the interface may still be unstable and that there are some outstanding problems.