I installed Hylafax from the Powertools CD and it setup the /etc/inittab with the faxgetty and on reboot got errors on init failing because their was not faxgetty. I could not find it anyware and a rpm -q -l did not show any faxgetty program in the package.
This is a problem with the compilation of lthe package. Try using the mgetty packages instead. Just so that you know, hylafax was dropped in 6.1 due to conflicts with the mgetty packages.