This is a legacy project and it remains here for historical reasons. The HLFL paper was written in 2002 and published by Robota, a well known spanish security company. The HLFLRW script was also coded in 2002 and presented in the 2003 No cON Name security congress in Palma de Mallorca, Spain.
HLFLRW sets a HLFL rules file asking a few questions, and then transforming them into the software (ipfw, ipfilter, ipfdadm, ipchains, iptables and cisco acl supported) you need.
"HLFL stands for High Level Firewall Language. It permits writing firewalling rules using a high level language, and transforms them into rules for real softwares" from the HLFL README file.
You need HLFL installed and root level on your system for the transforming support. Get HLFL from http://www.hlfl.org.