I wrote mkQNXnbi, a utility to allow net-booting QNX4 using
Etherboot - a versatile, open-source dhcp/bootp Ethernet boot-ROM package.
mkQNXnbi is included with the Etherboot-distribution tarball
(look into the directory /contrib/mkQNXnbi/).
You may wish to see the QNX community portal at http://www.openqnx.com/
for news, explanations, FAQ, forums, newsgroups, mailing lists,
software downloads, weblinks, tech reviews, searches, fun, tips,
online live support around QNX4 and QNX6.