You cannot compare "before" and "after" rules with Lokkit. Lokkit writes the rules to a file it calls /etc/sysconfig/firewall. The format of the file may vary with OS (if it migrates :)). Any later non-Red Hat versions may well put this file in a different place: if you are using Debian, for example, you will need to hunt about for the file.
Currently you need to have the rp3 package installed for the images the program uses.
You need Red Hat Linux or a Linux distribution which uses Red Hat-style init files or a distribution using Debian init files.
You need to have a Linux kernel with IPFW or IPChains enabled: this is default for most distributions and will (probably) only affect people who roll their own kernels.
In theory, a non-Linux port should just require adding a new writer module for your OS, provided that it has vaguely sane firewall facilities.
Apparently the lack of Quake is a Very Serious Bug!