First, edit ${SYSCONFDIR}/minbif/minbif.conf to suit your needs.
Then, either start it in daemon fork mode (will fork for every client):

	sudo -u _minbif ${TRUEPREFIX}/bin/minbif

Or start it through inetd, adding a line like:

127.0.0.1:6667    stream  tcp     nowait _minbif ${TRUEPREFIX}/bin/minbif minbif ${SYSCONFDIR}/minbif/minbif.conf

to your /etc/inetd.conf and restart inetd with

# kill -HUP `cat /var/run/inetd.pid`