I put up a new installer for the latest revision of horae on sourceforge. As it uses the Apple installer it is a simple click and everything happens automatically-type installation. Note for those who have used the Apple installer in the past and then deleted the installed files (let's say in /Applications/Ifeffit) for some reason, the Apple installer will not realize that the files have been deleted (there is no uninstall feature yet). If you have done this, you should delete the record of the files having been installed by deleting the file "Ifeffit for Tiger" in /Library/Receipts before you install again (or else the installer will say there is nothing to install!).
The installer is located in under the "Files" section, under "ifeffit" with the name Download ifeffit-1.2.8_Mac10.4.dmg
Paul